Abbott-Smith Manual Greek Lexicon
τάχος (G5034)
8 τάχος , -ους, τό [in LXX chiefly for parts and derivatives of מָהַר ;] swiftness, speed . Adverbially, ἐν τ. (= ταχέως ), quickly, speedily, soon : Lk 18:8 , Ac 12:7 22:18 25:4 , Ro 16:20 , I Ti 3:14 , Re 1:1 22:6 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain