Strong's G4728 · Greek

στενός

stenos · sten-os'

probably from the base of 2476; narrow (from obstacles standing close about)

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 3 στενός , -ή, -όν [in LXX for צַר , etc. ;] narrow : fig (v MM, xxiii), Mt 7:13, 14 , Lk 13:24 .† 

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