godan verb (-ru), transitive verb, intransitive verb
be amused; show interest
Rare verb meaning to be amused or interested in something; often used with を to mark the object of amusement. Modern Japanese more commonly uses 面白がる or 興味を持つ.
彼はその話を興がって聞いていた。
He listened to the story with amusement.
Derived from 興 (きょう, 'interest, amusement') + がる (suffix meaning 'to show signs of, to behave as if'). The exact historical development is uncertain.