noun

1. A concrete margin along the edge of a road; a kerb (UK, Australia, New Zealand)

2. A raised margin along the edge of something, such as a well or the eye of a dome, as a strengthening.

3. Something that checks or restrains; a restraint.

verb

1. To check, restrain or control.

   “"Curb your dog."”

2. To rein in.

3. To furnish with a curb, as a well; to restrain by a curb, as a bank of earth.

Synonyms: bow, flex, incurvate, behedge, curtail, limit, bend, fawn