Henry George Liddell, Robert Scott, A Greek-English Lexicon

A.“πληθύσῃ” Pl.Ti.83e:—intr. form of πληθύνω, to be or become full, c. gen., “νεκρῶν π. πέδον” E.HF1172; “ἡ πόλις π. ἀνδρῶν” Arist.Pol.1270a39; ἡ τοῦ γάλακτος πληθύουσα τροφή ib.1336a7: c. dat., “πληθύοι αὐτῷ οἶκος παίδων γοναῖς” IG12(9).1179.38 (Euboea, ii A.D.): abs., ἀγορῆς πληθυούσης, v. ἀγορά IV; “ὁ δῆμος ὁ Ἀθηναίων πληθύων” IG12.114.26,al., cf. Schwyzer 412 (Elis); of rivers, swell, rise, Hdt.2.19,20, etc.:—Med., ἐπεὰν πληθύεσθαι ἄρχηται ὁ Νεῖλος (v.l. πλήθεσθαι) ib. 93.

2. increase in number, multiply, A.Ch.1057, Pl.Lg.678b; increase in time, “ὁ πληθύων χρόνος” S.OC930:—Med., φῦλον ἐν τῷ ἑνὶ -όμενον possessing multiplicity in unity, Iamb.Myst.1.6.

3. abound, Pl.R.405a; τινι in a thing, S.Tr.54.

4. increase, grow, of the σπέρμα, Arist.Pol.1335a27.

5. spread, prevail, “ὡς ἐπλήθυον λόγοι” A.Ag.869; ὁ πληθύων λόγος the current story, S.OC377.

II. πληθύνω is generally trans., -ύω intr.; but πληθύω is trans. in S.Fr.718, κύναρος ἄκανθα πάντα πληθύει γύην, and πληθύομαι is Pass. (in signf. make multiple, 'plurify') in Procl.Inst.125, Dam.Pr.139: πληθύνω is intr. in later writers, Arist.Mete.351b7, GA738a37 (in both places with v.l.), LXXEx.1.20, al., v.l. in Nic.Dam.19 J., Act.Ap.6.1, Hdn. 3.8.8; and πληθύομαι is Med. in Hdt.2.93 (s.v.l., v. supr.), and in codd. of A.Supp.604; cf. “συμπληθύω. [ἐπλήθυ^ον” A.Pers.421; πληθυ_εται dub. in Id.Supp.604; quantity of υ elsewh. indeterminate.]