βαΐς
From LSJ
εἰ γάρ κεν καὶ σμικρὸν ἐπὶ σμικρῷ καταθεῖο καὶ θαμὰ τοῦτ᾽ ἔρδοις, τάχα κεν μέγα καὶ τὸ γένοιτο → for if you add only a little to a little and do this often, soon that little will become great (Hesiod W&D, 361-362)
German (Pape)
[Seite 426] ἡ, Palmenzweig, Hesych. S. βαΐον.
Frisk Etymological English
ιν
Grammatical information: f.
Meaning: palm leaf (LXX, Pap.),
Other forms: βάϊον n. id.; also measure (Ev. Jo., Pap.).
Derivatives: Adj. βαϊνός (Sm.) of palm leaf, βαινή f. branch of a palm (LXX).
Origin: LW [a loanword which is (probably) not of Pre-Greek origin]
Etymology: From Eg. b`j, Copt. bai; s. Hemmerdinger, Glotta 46 (1968) 245f..