Strong’s Greek
G5036 — tachus
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ταχύς
tachus — pronounced takh-oos'
of uncertain affinity; fleet, i.e. (figuratively) prompt or ready:--swift.
1 occurrence in the KJV.
James 1:19
Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath: