The Hebrew noun tola'at can name a worm or grub and, through the dye associated with such a creature, crimson or scarlet material. Exodus repeatedly places the dyed yarn alongside blue, purple, fine linen, skilled work, and obedience in the tabernacle and priestly garments. Leviticus and Numbers include scarlet material in specific cleansing rites, while Isaiah uses the color to picture sins that God can make white.
Other texts retain the creature sense: stored manna breeds worms, a worm destroys Jonah's plant, and prophetic or poetic passages portray mortality and decay. Psalm 22 uses the speaker's comparison to a worm as language of humiliation, not as a biological description or permission to demean sufferers. Context must therefore decide whether the noun identifies a creature, dye, yarn, or figurative comparison.
Responsible teaching does not turn the dye's production, its color, or the worm image into a secret code. It also refuses ritual magic, shame, disgust toward bodies, and confident claims that every scarlet object symbolizes sin, blood, royalty, or redemption.