(at) once (for all)

Strong’s Dictionary of Greek Words:

Number:
2178 (find all occurrences in KJV Bible)
Greek:
ἐφάπαξ
Transliteration:
ephapax
Phonic:
ef-ap’-ax
Meaning:
from 1909 and 530; upon one occasion (only)
KJV Usage:
(at) once (for all)