fēstīvē adv.
festivus, humorously, facetiously, wittily : agere fabellam: tradere elementa loquendi.—In applause: ‘belle et festive.’
festīvē, adv., v. festivus fin. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
·adj Pertaining to, or becoming, a feast; festal; joyous; gay; mirthful; sportive. ...
Webster's Dictionary of the English Language