(chiefly transitive) To manipulate someone such that they doubt their own memory, perceptions of reality, or sanity, typically for malevolent reasons.

The state or quality of being poisonous.

(of a person or their behaviour) Remaining composed and dignified, and avoiding too much activity or excitement. / (of an object, particularly a building) Not overly ornate or showy.

the state or property of being unripe