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ob- / oc- / of- / op-

against, toward, in the way

Latin · ob

Latin ob means toward, against, or in the way. It assimilates to the next letter: oc-cur, of-fend, op-pose. It often suggests facing or blocking: obstacle (stands in the way), oppose (set against).

Memory trick

ob- is a roadblock: something stands in the way, facing you.

Words from this root