1) Offence also has a more common meaning: action(s) in attacking enemy by arm-forces; or attacking the opposing (sports) team; and some times verbal attack.

2) I think these are O.K. in modern time:

(หลีกเลี่ยง อย่าใช้ O.K. เป็น adj. เช่น) ‘Things are not O.K. with us.’

(และอย่าใช้เป็น adv. เช่น) ‘The car was running O.K.’

Both (no-nos) are well understood and used quite often.