ταχεῖα, ταχύ (*ταχυ)
ταχύ(ς) as an adjective means “quick, swift.”
ταχύ(ς) as an adverb means “quickly.”
“Εveryone must be ταχύς to listen, slow to speak, and slow to become angry” (James 1:19).
“Yes, I am coming ταχύς!” Amen! Come, Lord Jesus!” (Rev 22:20).