Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Fortunately, players can end the effect by destroying The Librarian, a special Umbral Portal at the center of the library.
Source: https://gamerant.com/baldurs-gate-3-bg3-how-complete-the-gauntlet-of-shar/