Strong's G4744 · Greek

στίλβω

stilbo · stil'-bo

apparently a primary verb; to gleam, i.e. flash intensely

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 1 στίλβω [in LXX: Na 3:3 ( לַהַב ), etc. ;] to shine, glisten : Mk 9:3 .† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain