LSJ
Adv.
in the Greek language, Pl. Ti. 21e, PTaur. 1v4 (ii BC), Ph. 2.546, J. AJ 14.10.2, etc. ; Ἑ. συνιέναι to understand Greek, X. An. 7.6.8; Ἑ. γινώσκεις ; Act. Ap. 21.37; in Greek fashion, Luc. Scyth. 3.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
TBESG
Ἑλληνιστί
adv.,
in Greek: Jhn.19:20; Ἑ. (sc. λαλεῖν) γινώσκεις, Act.21:37 (cf. Field, Notes, 135).†
(AS)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars