best-behaved

Adjective

well-behaved (comparative better-behaved or more well-behaved, superlative best-behaved or most well-behaved)

1. Having good manners and acting properly; conforming to standards of good behaviour.
   • The boy is well-behaved and is seldom naughty.

   Synonyms:

   mannersome, seemly, well-mannered

   Antonyms:

   ill-behaved

2. Having intuitive, easy to handle properties, especially: having a finite derivative of all orders at all points, and having no discontinuities.

   Antonyms:

   degenerate, pathological