ἦρος
From LSJ
δωρεὰν ἐλάβετε, δωρεὰν δότε → you have taken freely; give freely
English (LSJ)
ὁ, dub. sens. in IG11(2).144A72 (Delos, iv B.C.); ἦρον ὠνουμένων ἔδωκεν... τὸν ἦρον ἐνδήσαντι... τέλος ἐν Πάρῳ τοῦ ἤρου, ib.203A 39, 40 (iii B.C.); cf. ἠρίσκος.
Russian (Dvoretsky)
ἦρος: стяж. (= ἔαρος) gen. к ἔαρ.
Frisk Etymological English
Grammatical information: m.
Meaning: with ἠρίσκος of unknown meaning (Delos IV -IIIa).
Origin: XX [etym. unknown]
Etymology: Unexplained.