a 'poisonus' adjective describes something harmful or negatively impactful. As it describes another character or thing, it is used to represent a quality or state.
1. The poisonous snake slithered away.
2. Her words were poisonous to his heart.
3. The storm brought with it a poisonous smell.
tips, nuances, and common mistakes include that the adjective is often confused with the adverb 'poisonously,' which is used to indicate how an action is done (e.g. He spoke poisonously).