Lexical Definition

‎κλάω‎ kláō (klah'-o) to break ^G:V
a primary verb

break.

• to break (specially, of bread)

Abbott-Smith

κλάω, [in LXX: Je 16:7 (פּרם), al.;]
to break, break in pieces: of bread, Mt 14:19 15:36 26:26, Mk 8:6 14:22, Lk 22:19 24:30, Ac 2:46 20:7, 11 27:35, I Co 10:16 11:24; seq. εἰς, c. acc. pers., Mk 8:19 (cf. ἐκ-, κατα-κλάω).†

Abbott-Smith References

Liddell-Scott-Jones

κλάω [ᾰ],

__A imperfect ἔκλων (κατ-) [Refs 8th c.BC+]: future κλάσω [ᾰ] [Refs 1st c.AD+]: aorist 1 ἔκλᾰσα, Epic dialect κλάσε [Refs 8th c.BC+]:—middle, poetry aorist κλάσσατο [Refs 4th c.BC+]:—passive, future κλασθήσομαι [Refs 4th c.BC+]: aorist ἐκλάσθην [Refs 8th c.BC+]: perfect κέκλασμαι [Refs 4th c.BC+]aorist 2 participle κλάς (as if from κλῆμι) [Refs 6th c.BC+]:—break, break off, ἐξ ὕλης πτόρθον κλάσε [Refs 8th c.BC+]; break off the luxuriant shoots of the vine, [NT+4th c.BC+]
__A.2 Geometry texts, deflect, inflect, usually of drawing a straight line 'broken back' at a line or surface, κλάσαι εὐθεῖαν τὴν ΑΓΒ ἐν λόγῳ τῷ δοθέντι [Refs 3rd c.AD+]; ἀπὸ δύο σημείων τῶν B, E κλάσαι τὴν ΒΝΞΕ [Refs]:—more frequently in passive, [Refs 4th c.BC+].; ἡ κεκλασμένη (i.e. γραμμή) [Refs 3rd c.BC+]; ἐὰν ἀπὸ τῶν σημείων κλασθῶσιν[Refs 3rd c.BC+]; of visual rays, [Refs 4th c.BC+]; of arteries, [Refs 1st c.AD+] their broken courses, [Refs]
__A.3 metaphorically, break, weaken, frustrate, τὴν ἐλπίδα [Refs 1st c.AD+]perfect participle passive, κεκλασμένη φωνή weak, effeminate voice, [Refs 5th c.BC+] (also of the Siren's song, [Refs 2nd c.AD+]; τὰ κεκλ. τῶν ὀμμάτων enfeebled eyes, [Refs 4th c.BC+]; κεκλ. μέλη varied by modulation, [Refs 1st c.AD+]; ῥυθμὸς κεκλ. broken rhythm, [Refs 3rd c.AD+]; τὸ κεκλ. καὶ παντοδαπόν (i.e. τῆς λέξεως) [Refs 1st c.BC+]
__A.3.b of emotion, ἐκλάσθην πρὸς ἔλεον [Refs 1st c.AD+]

_{LSJ Scripture Refs: 1Cor.10.16}