Strong's G4688 · Greek

σπεκουλάτωρ

spekoulator · spek-oo-lat'-ore

of Latin origin; a speculator, i.e. military scout (spy or (by extension) life-guardsman)

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 1 *† σπεκουλάτωρ, -ορος (Rec. -ωρος ), ὁ (Lat. speculator ), prop., a spy or scout . An executioner : Mk 6:27 (v. Swete, in l.).† 

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