deportment means

An antonym for the word deportment is "misbehavior" or "unruliness."

of Deport

The word deportment, meaning behavior or attitude, can be used like this: All the teachers agree that Jenny's deportment is not satasfactory. The sales manager groomed his associates in deportment to insure high productivity. The deportment of the concierge earned him a four-figure bonus.

From Wiktionary: bearing; manner of presenting oneself; example: "Her deportment impressed her interviewers." Check the Wiktionary for additional meanings.