Lexical Definition

‎σής‎ sḗs (sace) moth G:N-M
apparently of Hebrew origin (‎סָס‎)

moth.

Usage: 4 forms in 12 verses
Form Translated As     In Verse(s)
σὴσ moth Matt.6.19Matt.6.20Luke.12.33
σητόσ a moth LXX.Isa.51.8
of a moth LXX.Job.4.19
σησ a moth LXX.Prov.14.30LXX.Prov.25.20LXX.Isa.33.1LXX.Isa.50.9LXX.Mic.7.4
σήτεσ a moth LXX.Job.27.18
moths LXX.Job.32.22

Abbott-Smith

σής, σητός (late gen. for cl. σεός), , [in LXX: Jb 4:19, Is 50:9 (עָשׁ), Is 51:8 (סָס), al. ;]
a moth, clothes moth: Mt 6:19, 20, Lk 12:33.†

Abbott-Smith References

Book Refs
Job 4:19
Isaiah 50:9 · 51:8
Matthew 6:19
Luke 12:33

Liddell-Scott-Jones

σής, ,

genitive σεός (as if from σεύς, which is given as nominative by [Refs 4th c.AD+]; genitive σέων [Refs 5th c.BC+] —the forms σητός, σῆτες, σητῶν, etc., were later, as in [Refs 4th c.BC+] [same place], etc.:—moth, [χρυσὸν] οὐ σ. οὐδὲ κὶς δάπτει [NT+5th c.BC+]

__2 metaphorically, σῆτες ἀκανθοβάται or -λόγοι, of the Grammarians, bookworms, [Refs 1st c.AD+]

LSJ Scripture Refs: Matt.6.19Luke.12.33