ψελλός
From LSJ
ἀγὼν πρόφασιν οὐκ ἐπιδέχεται οὐδὲ φιλία → no excuse is allowed by a contest or by a friendship
English (LSJ)
ή, όν,
A faltering in speech, like a child; distd. fr. τραυλός (lisping), Arist.HA492b32, Pr.902b22; τὸ ψ. prob. in Phld.Rh.2.206S.; ἡ ψελλὴ οὐ πιττεύω (i. e. πιστεύω) Suid., App.Prov.3.17. II Pass. of words, inarticulate, obscure, unintelligible, A.Pr. 816; ψελλόν ἐστι καὶ καλεῖ τὴν ἄρκτον ἄρτον Com.Adesp.393.