Usage: 5 forms in 7 verses
Form Translated As     In Verse(s)
εσπερινών evenings LXX.Lev.23.5
εσπερινώ during the evening LXX.Prov.7.9
εσπερινήσ evening LXX.Ezra.9.4
of evening LXX.Dan.9.21
εσπερινήν evening LXX.2Kgs.16.15
εσπερινή at evening LXX.Ps.141.2
evening LXX.Ezra.9.5

Liddell-Scott-Jones

ἑσπερινός (hesperinos) during evening G:A

ἑσπερινός-ιος, α, ον,

and ος, ον [Refs 5th c.BC+]: (ἕσπερος):

__I of Time, towards evening, [Refs 8th c.BC+]; ἑσπερίῃσι (i.e. ὥραις) at eventide, [Refs 3rd c.AD+]; ἄχρι ἑσπερίου (i.e. χρόνου) [Refs 4th c.BC+]; . ἀοιδαί songs sung at even, [Refs 5th c.BC+]: in late Prose, ἑσπέριος [γένεσις] [Refs 2nd c.AD+]
__II of Place, western, ἠὲ πρὸς ἠοίων . ἀνθρώπων [Refs 8th c.BC+]the western parts, [Refs 5th c.BC+]; ἀφ᾽ ἑσπερίης (i.e. χώρης) from the west, [Refs]
__III ἑσπερινόςιος, , =Ἕσπερος, the star, [Refs 2nd c.AD+] compare ϝεσπάριοι, of the [Refs 5th c.BC+], Latin vesper.)