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ξένον

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

Greek Monolingual

το
χημ. βλ. ξένο.

Russian (Dvoretsky)

ξένον: τό странность, необычность (τῆς ὑποθέσεως Luc.).