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רָנַן

Γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ -> The fool laughs even when there's nothing to laugh at
Menander

English (Strong)

a primitive root; properly, to creak (or emit a stridulous sound), i.e. to shout (usually for joy): aloud for joy, cry out, be joyful (greatly, make to) rejoice, (cause to) shout (for joy), (cause to) sing (aloud, for joy, out), triumph.