חָגַג
From LSJ
Εὑρεῖν τὸ δίκαιον πανταχῶς οὐ ῥᾴδιον → Difficile inventu est iustum, ubi ubi quaesiveris → Zu finden, was gerecht ist, ist durchaus nicht leicht
English (Strong)
a primitive root (compare חָגָּא, חוּג); properly, to move in a circle, i.e. (specifically) to march in a sacred procession, to observe a festival; by implication, to be giddy: celebrate, dance, (keep, hold) a (solemn) feast (holiday), reel to and fro.