Strong's G5036 · Greek

ταχύς

tachus · takh-oos'

of uncertain affinity; fleet, i.e. (figuratively) prompt or ready

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 5 ταχύς , -εῖα, -ύ [in LXX chiefly for מָהַר pi. ;] quick, swift, speedy : opp. to βραδύς , Ja 1:19 .† 

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