MISBEHAVE

Source: 566, 567

misbehave. Misbehave, v.t. to behave improperly or badly

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Mis′be‐have″ (?), v. t. & i. [imp. & p. p. Misbehaved (?); p. pr. & vb. n. Misbehaving.] To behave ill; to conduct one's self improperly; — often used with a reciprocal pronoun.