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

A.“κνᾷ” Plu.2.61d, but in correct Att. κνῇ, inf. κνῆν (v. ἐπικνάω) corrupted to κνεῖν Moer.p.234 P., Hsch., Ion. “κνᾶν” Hdt.7.239: fut. “κνήσω” Hp.Coac.460 (prob. l.): aor. “ἔκνησα” Id.Int.23, Pl.Smp.185c (prob.l.), Arist.Pr.965a23, (κατ-) Ar.V.965; but κνᾶσαι: ὀλέσαι, λυπῆσαι, Hsch.; 3sg. Ep. impf. “ἐπι-κνῆ” Il.11.639:—Med., inf. “κνῆσθαι” Pl.Grg.494c, later “κνᾶσθαι” Plu.2.89e, etc.: fut. “κνήσομαι” Herod.4.51: aor. “ἐκνησάμην” Luc.Bis Acc.1, Dor. ἐκνα_ς- Theoc.7.110:—Pass., “κνᾶται” Gal.10.979: pf. “κατα-κέκνησμαι” Id.13.1022:—scrape, grate, ἐπὶ δ᾽ αἴγειον κνῆ τυρόν Il.l.c., cf. Hp.Int. l.c.; τὸν κηρὸν κνᾶν to scrape it off, Hdt.l.c. (nisi leg. ἐκκν-), cf. Gal.13.1022:—Pass., prob. for κνισθεῖσα in Thphr.HP9.20.4.

II. scratch, “τῇ χειρί” Hp.Fract.21; τὸν περὶ τὰς μασχάλας τόπον Arist.l.c.:—Med., scratch oneself, “ἀφθόνως ἔχειν τοῦ κνῆσθαι” Pl.Grg.l.c.; “κνώμενος τὸ κρανίον” Timocl.2.5 D.; τὸ βρέγμα κνήσῃ Herod.l.c.; [“ἔλαφοι] κνώμενοι [τὰ κέρατα] πρὸς τὰ δένδρα” Arist.HA611b16; “δακτύλῳ κνᾶσθαι τὴν κεφαλήν” Plu.Pomp.48: abs., Id.2.1091e, Jul.Caes.323b; “τρίβειν τοὺς ὀφθαλμοὺς καὶ κνᾶσθαι” Phld. Rh.2.143 S.; κνήσασθαι τὸ οὖς Luc.l.c.; “κνησάμενον ἑνὶ τῶν ποδῶν τὴν πλευράν” Gal.8.443.

2. Med., itch, Id.10.437, 979.

III. tickle, τὴν ῥῖνα prob. in Pl.Smp.l.c.:—Med., κνᾶσθαι τὰ ὦτα πτερῷ tickle one's ears, Luc.Salt.2, etc.: metaph., “τοῦτο κνᾷ καὶ γαργαλίζει καὶ ἀναπείθει” Plu.2.61d:—Pass., “οὐ παρέργως ἐκνώμην πρὸς αὐτά” Luc. Nec.3.