Lexical Definition

‎ἐλαττονέω‎ elattonéō (el-at-ton-eh-o) to have little G:V
from ‎ἐλάσσων‎

have lack.

Usage: 9 forms in 11 verses
Form Translated As     In Verse(s)
ἠλαττόνησεν lacked 2Cor.8.15
ηλαττόνησεν had not too less LXX.Exod.16.18
ηλαττονούτο lessened LXX.Gen.8.5
was lessened LXX.Gen.8.3
ηλαττονήθη had not less LXX.1Kgs.17.16
ελαττονωθώσιν may be lessened LXX.Gen.18.28
ελαττονούνται having less LXX.Prov.11.24
ελαττονήσει have less LXX.1Kgs.17.14
shall not less LXX.Exod.30.15
ελαττονή lack LXX.1Kgs.11.22
ελασσονούσι lessen LXX.Prov.14.34

Abbott-Smith

ἐλαττονέω, -ῶ (< ἔλαττον), [in LXX (with -όω) chiefly for חָסֵר ;]
to be less (RV, had no lack): II Co 8:15 (LXX) (a rare word; cf. MM, Exp., xii).†

Abbott-Smith References

Book Refs
2 Corinthians 8:15

Liddell-Scott-Jones

ἐλαττονέω-έω,

receive less, [LXX]; but, give less, [Refs 4th c.BC+]

__2 waste, be consumed,[LXX+4th c.BC+]; to be missing, defective, [Refs 3rd c.AD+]
__3 middle, lack, want, [Refs]

LSJ Scripture Refs: LXX.Exod.16.18LXX.1Kgs.17.16