Looking at the following words:

GALL

The Hebrew word for gall is "rohsh"- Resh, Aleph, Shin (ראש). It is from Strong's Concordance number 7219 and its definition

Apparently the same as H7218; a poisonous plant, probably the poppy (from its conspicuous head); generally poison (even of serpents): - gall, hemlock, posion, venom.

from 7218 "rohsh" (ראש), and its definition

From an unused root apparently meaning to shake; the head (as most easily shaken), whether literally or figuratively (in many applications, of place, time, rank, etc.): - band, beginning, captain, chapiter, chief (-est place, man, things), company, end, X every [man], excellent, first, forefront, ([be-]) head, height, (on) high (-est part, [priest]), X lead, X poor, principal, ruler, sum, top.

As noted, this Hebrew word also means "head". This also could emphasize the "false head", which is HaSatan.

Monte Judah of Lion and Lamb Ministries noted that this will make one sicker, and sicker, until the person is dead.

In this week's Torah portion passage, it means that the head of a man would symbolically be fructified with poison. This is the same substance that Yeshua was given, but refused. I researched why there were two different places in the Gospels where one source says that He received the sponge at the cross, and another saying He refused the sponge at the cross. The reason is, because Yeshua was offered "two" different sponges. The first time Yeshua was given the sponge, which is noted in the Gospel of Matthew

Matthew 27:33 And when they were come unto a place called Golgotha, that is to say, a place of a skull, 34 They gave Him vinegar to drink mingled with gall: and when He had tasted thereof, He would not drink.

This is, because the sponge was filled with "poison", which is the gall. This poison was a substance which would have killed Him. If Yeshua took this, He would have disqualified Himself to be the Messiah, because He would have not finished His set of last words before He died by saying "It is finished". That gall would have finished Him first, and the Jewish People, the Jewish authorities, the Romans, and the world, as well as the prince of this world, HaSatan, would have stated "It is finished" against Yeshua instead of Yeshua saying this Himself against HaSatan.

This is the second time that He was given a sponge, which is noted in the Gospels of Matthew and John

Matthew 27:48 And straightway one of them ran, and took a spunge, and filled it with vinegar, and put it on a reed, and gave Him to drink.

John 19:28 After this, Yeshua knowing that all things were now accomplished, that the Scripture might be fulfilled, saith, I thirst. 29 Now there was set a vessel full of vinegar: and they filled a spunge with vinegar, and put it upon hyssop, and put it to His Mouth. 

Notice that this second sponge account is noted later the same Gospel of Matthew chapter compared to the first account. There was no gall added to this sponge, therefore He took this second sponge, and later said "It is finished".


WORMWOOD

The Hebrew word for wormwood is "lah-ah-nah"- Lamed, Ayin, Nun, Heh (לענה). It is from Strong's Concordance number 3939, and its definition

From an unused root supposed to mean to curse; wormwood (regarded as poisonous, and therefore accursed): - hemlock, wormwood.

In this week's Torah portion passage, this would symbolically be one's manifestation of his head full of poison by saying that the other aspect of the fructification of a man would be speaking out "cursing".

In this week's Torah portion passage, Moses was saying to them in many words, "Lest they be fructified with the head full of poison and speaking out cursing". Going back to Matthew's Gospel account noted above when Yeshua was offered vinegar and gall at the cross, the first sponge account, if He took it, He would be taking poison, which would symbolically effect His head and cause Him to speak "curses". That is also the spiritual significance why He did not take it. Also spiritually, we as believers need to guard our minds from giving into spiritual poison from HaSatan and his demons, as well as the flesh and the world, that would cause us to speak curses. 

The apostle Paul noted an example of how one's heart and mind could be guarde, which is noted in his letter to the assembly in Philipia

Phillipians 4:6 Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto hwhy. 7 And the Peace of hwhy, which passeth all understanding, shall keep your hearts and minds through Messiah Yeshua. 8 Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.


Also indirectly related, King David speaks about the tongue, which is noted in the book of the Psalms

Psalm 59:11 Slay them not, lest my People forget: scatter them by Thy Power; and bring them down, Adonai, our Shield. 12 For the sin of their mouth and the words of their lips let them even be taken in their pride: and for cursing and lying which they speak. 

The apostle James also noted about the tongue, which he noted in his epistle

James 3:1 My brethren, be not many masters, knowing that we shall receive the greater condemnation. 2 For in many things we offend all. If any man offend not in word, the same is a perfect man, and able also to bridle the whole body. 3 Behold, we put bits in the horses' mouths, that they may obey us; and we turn about their whole body. 4 Behold also the ships, which though they be so great, and are driven of fierce winds, yet are they turned about with a very small helm, whithersoever the governor listeth. 5 Even so the tongue is a little member, and boasteth great things. Behold, how great a matter a little fire kindleth! 6 And the tongue is a fire, a world of iniquity: so is the tongue among our members, that it defileth the whole body, and setteth on fire the course of nature; and it is set on fire of hell. 7 For every kind of beasts, and of birds, and of serpents, and of things in the sea, is tamed, and hath been tamed of mankind: 8 But the tongue can no man tame; it is an unruly evil, full of deadly poison. 9 Therewith bless we hwhy, even the Father; and therewith curse we men, which are made after the similitude of hwhy. 10 Out of the same mouth proceedeth blessing and cursing. My brethren, these things ought not so to be.

The tongue is a very powerful tool. We as believers need to be careful in what we speak.



Verse nineteen

19 And shall be, in his hearing את-the Words of this alah-curse, and shall bless in his heart, to say, Peace shall be (belong) to me, for I walk in the stubborness (hostility imagination) of my heart, by that, to add the drunkenness to את-the thirsty:

The Hebrew word for stubborness (hostility, imagination) is "sh'ree-rooth"- Shin, Resh, Yod, Resh, Vav, Tav (שרירות). It is from Strong's Concordance number 8307 and its definition

From H8324 in the sense of twisted, that is, firm; obstinacy: - imagination, lust.

from 8324 "Shah-rahr" (שרר), and its definition

A primitive root; to be hostile (only active participle an opponent): - enemy.

There is another Hebrew word similar to this Hebrew word which is most likely related:

from 5637 "Sah-rahr" (סרר), and its definition

A primitive root; to turn away, that is, (morally) be refractory: -  X away, backsliding, rebellious, revolter (-ing), slide back, stubborn, withdrew.



Verse twenty

20 יהוה will not breathe forgiveness [(be willing at forgiving)] to him, for then shall smoke the Anger of יהוה and His Jealousy (Zealousy, Zealousness) shall be against that man, and shall crouch on Him all of the alah-curses that were written in this Scroll, and יהוה shall blot out (abolish) את-his name from under the Heavens.

This is similar to what יהוה said to Moses at Mount Sinai, which is noted in the Torah portion of Ki Thisa, in book of Exodus

Exodus 32:31 And Moses returned to יהוה, and said, Oh now, this People have sinned a great sin, and they have done (made) for themselves elohim of gold. 32 And now, if You will, lift away (bear away, carry away) their sin, and if not, blot me now from Your Scroll which You have written. 33 And יהוה said to Moses, Whom which has sinned to Me, I will blot him out of My Scroll.

In the Brith Khadashah (the New Covenant), the assembly of Sardis was given a warning to stick with the faith or be blotted out of the book, which is noted in the book of Revelation

Revelation 3:1 And unto the angel of the assembly in Sardis write; These things saith He that hath the seven Spirits of יהוה, and the seven stars; I know thy works, that thou hast a name that thou livest, and art dead. 2 Be watchful, and strengthen the things which remain, that are ready to die: for I have not found thy works perfect before hwhy. 3 Remember therefore how thou hast received and heard, and hold fast, and repent. If therefore thou shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee. 4 Thou hast a few names even in Sardis which have not defiled their garments; and they shall walk with Me in white: for they are worthy. 5 He that overcometh, the same shall be clothed in white raiment; and I will not blot out his name out of the Scroll of Life, but I will confess his name before My Father, and before His angels.

For those whose names will be blotted out (I pray that is not the case for anyone), this is an idea what Yeshua is going to see in the Scroll