μῦ
From LSJ
πρέπει γὰρ τοὺς παῖδας ὥσπερ τῆς οὐσίας οὕτω καὶ τῆς φιλίας τῆς πατρικῆς κληρονομεῖν → it is right that children inherit their fathers' friendships just as they would their possessions
English (LSJ)
τό, name of the letter μ, IG2.4321.24 (iv B. C.), Epigr. ap. Ath. 10.454f, Hellad. ap. Phot.Bibl.p.530 B., etc. 2 μῦ or μὺ μῦ, to represent a muttering sound made with the lips, μῦ λαλεῖν to mutter, Hippon.80 (dub. l.); to imitate the sound of sobbing, μὺ μῦ, μὺ μῦ Ar.Eq.10.
French (Bailly abrégé)
1(τό) :
indécl.
v. Μ, μ.
2interj.
onomatopée pour exprimer un gémissement, un grognement.
Russian (Dvoretsky)
μῦ: I τό indecl. мю (название буквы μ).
II и μύ interj., выраж. скорбь, рыдание, стон Arph.: μῦ λαλεῖν Sext. бормотать.
III voc. к μῦς.