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Γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → The fool laughs even when there's nothing to laugh at
sibus: callidus sive acutus, Fest. p. 336 Vahl.; cf. persibus.
sĭbus, a, um, fin, avisé : P. Fest. 336, 3 ; v. persibus.
sibus, a, um, scharfsinnig, gescheit, schlau, Paul. ex Fest. 336, 3.
*sibus, a, um. adj. :: 伶俐。聰明者