O / offensus
noun

offensus

gen. offensūs · gender masculine · decl. 4th
a striking against; a shock poetic
a striking against, a shock (poet. and in post-class. prose).
Lit., Lucr. 2, 223; 4, 359; Tert. adv. Marc. 4, 39.—
by extension
A lighting upon; meeting with
A lighting upon, meeting with: per offensus armorum, Stat. Th. 12, 283.—
An offence; vexation; annoyance
An offence, vexation, annoyance: sin vita in offensu est, Lucr. 3, 941.