As if a superlative of hekas (afar); each or every -- any, both, each (one), every (man, one, woman), particularly.
a. joined to a substantive: ἕκαστον δένδρον, Luke 6:44; ἑκάστῳ στρατιώτῃ, John 19:23; κατά μῆνα ἕκαστον, every month, Revelation 22:2 (not Rec.); καθ' ἑκάστην ἡμέραν, Hebrews 3:13; cf. Winers Grammar, 111 (106); Buttmann, § 127, 30. preceded by εἷς, Latinunusquisque, every one: with a substantive, Ephesians 4:16; Revelation 22:2 Rec. b. used substantively: John 7:53 (Rec.); Acts 4:35; Romans 2:6; Galatians 6:4, etc.; once plural ἕκαστοι: Revelation 6:11 Rec. With a partitive genitive added: ἡμῶν, Romans 14:12; ὑμῶν, Luke 13:15; 1 Corinthians 1:12; Hebrews 6:11; αὐτῶν, John 6:7 (R G); τῶν σπερμάτων, 1 Corinthians 15:38. εἷς ἕκαστος, every one (see εἷς, 4 b.): without a partitive genitive, Acts 20:31; Colossians 4:6; with a partitive genitive, Luke 4:40; Acts 2:3; Acts 17:27; 1 Corinthians 12:18, etc. ἕκαστος, when it denotes individually, every one of many, is often added appositively to nouns and pronouns and verbs in the plural number (Matthiae, ii., p. 764f; (Winers Grammar, 516 (481); Buttmann, 131 (114))): ἡμεῖς ἀκούομεν ἕκαστος, Acts 2:8; σκορπισθῆτε ἕκαστος, John 16:32; ἐπορεύοντο πάντες ..., ἕκαστος ..., Luke 2:3; add, Acts 3:26; 1 Peter 4:10; Revelation 5:8; Revelation 20:13; likewise εἷς ἕκαστος, Acts 2:6; Acts 21:26; ὑμεῖς οἱ καθ' ἕνα ἕκαστος τήν ἑαυτοῦ γυναῖκα ἀγαπάτω, you one by one, each one of you severally, Ephesians 5:33. In imitation of the Hebrew, ἕκαστος τῷ ἀδελφῷ αὐτοῦ (לְאָחִיו אִישׁ, Genesis 26:31), Matthew 18:35; μετά τοῦ πλησίον αὐτοῦ (אֶל־רֵעֵהוּ אִישׁ, Judges 6:29, etc.), Ephesians 4:25, cf. Hebrews 8:11 Rec.