amuser.

Etymology tree Proto-Indo-European *h₂éd Proto-Italic *ad Proto-Italic *ad- Latin ad- Old French a- Medieval Latin musumder.? Old French muser Old French amuser Middle French amuser French amuser Inherited from Middle French amuser (“to amuse, divert, babble”), from Old French amuser (“to stupefy, waste time, be lost in thought”), from a- + muser (“to stare stupidly at, gape, wander, waste time, loiter, think carefully about, attend to”), of uncertain and obscure origin. Cognate with Occitan musa (“idle waiting”), Italian musare (“to gape idly about”). Possibly from Old French *mus (“snout”) from Vulgar Latin *mūsa (“snout”) (compare Medieval Latin mūsum (“muzzle, snout”)), from Proto-Germanic *mū- (“muzzle, snout”), from Proto-Indo-European *mū- (“lips, muzzle”). Compare German Maul (“muzzle, snout”). An alternative etymology connects Old French muser and Occitan musa with Old High German muoza (“careful attention, leisure, idleness”), from Proto-Germanic *mōtǭ (“leave, permission”), from Proto-Indo-European *med- (“to acquire, possess, control”). Compare also Old High German muozōn (“to be idle, have leisure or opportunity”), German Muße (“leisure”). More at empty.