ἑορτάζω (heortázō|heh-or-tad'-zo|verb|to celebrate a feast)
[Grk] ἑορτάζω LN: 51.1 GK: G2037 Hebrew: חָגַג‎
Derivation: from ἑορτή;
Strong's: to observe a festival
KJV: --keep the feast.
See: ἑορτή