ETYMOLOGY
from offence (to offend) + -ant
EXAMPLE
“…Now agayne because the ribbes, in their inner region or side, are succinged and clothed with a most sensible Membran called Pleura, and to the end that, the asperitie and roughnes of the ribbes, might not be at any time, to the sensibilitie of the same, offensaunt, it was therfore carefully prouided for, they beyng inwardly, wrought so smooth & easie for the same as may be deuised…”
From: The Historie of Man
By John Banister, 1578
Lexicophilia 