γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → the fool laughs even when there's nothing to laugh at
P. and V. φρούριον, τό, φρουροί, οἱ, φρουρά, ἡ, φύλακες, οἱ, Ar. and P. φυλακή, ἡ.
P. and V. φρουρεῖν.
