ἄρνησις

εως, ἡ
A. denial, τούτου δ’ οὔτις ἄ. πέλει A. Eu. 588; τῶνδ’ ἄ. οὐκ ἔνεστί μοι S. El. 527, cf. OT 578: foll. by τὸ μή c. inf., D. 19.163.
II. Gramm., negation, D.T. 642.3, Lesb.Gramm. 26; δύο ἀ. μίαν συγκατάθεσιν ποιοῦσι two negatives make an affirmative, Sch.S. OT 1053.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project