Usage: 6 forms in 10 verses
Form Translated As     In Verse(s)
ωλιγώθησαν they are made few LXX.Eccl.12.3
they were made few LXX.Ps.107.39
were lessened LXX.Ps.12.1LXX.Joel.1.12
ωλιγώθη are lessened LXX.Nah.1.4
lessened LXX.Joel.1.10
ολιγώσησ a few LXX.2Kgs.4.3
ολιγώσεισ few LXX.Hab.3.12
ολιγωθήτω be lessened LXX.Neh.9.32
ολιγωθήσεται shall be lessened LXX.Prov.10.27

Liddell-Scott-Jones

ὀλιγόω (oligoō) to lessen G:V

ὀλιγόω,

lessen, diminish, ἐν ἀπειλῇ -ώσεις γῆν [LXX]; ἔτη ἀσεβῶν -ωθήσεται[LXX]; ὠλιγώθη ψυχὴ αὐτοῦ his soul was grieved,[LXX]

LSJ Scripture Refs: LXX.Hab.3.12LXX.Prov.10.27LXX.Judg.10.16