By compulsion.

plural of compellation

(grammar) The name by which a person is addressed; an appellative.

plural of compellative

plural of compelling

(law) To officially require that a witness appear and testify before a court of law or other public authority, under threat of legally enforceable penalties for failure to do so.

In a compelling manner.

Serving to compel; compulsory.

(archaic) third-person singular simple present indicative form of compel

(archaic) second-person singular simple present form of compel