the prefix ob means against something e.g objection, obstacle, obstruction
opening batsman
The prefix of "obsess" is "ob-".
The prefix of "oblige" is "ob-".
The prefix of "obtrusive" is "ob-".
Yes, "obstruct" has a prefix "ob-" and a suffix "-ct." The prefix "ob-" means against or in opposition, while the suffix "-ct" is a verb-forming suffix in this case.
ob
The prefix for "oblivious" is "ob-." In this case, "ob-" is a prefix that means "against" or "towards." When added to the word "oblivious," it changes the meaning to suggest a lack of awareness or consciousness towards something.
opposed That starts with "op" not "ob"
of- ,op- ,ob- eg: object,offend,oppress.
The prefix od- otherwise known as ob- means toward, against, or completely.
ob which means toward, against, in the way
A 75 hp Mercury outboard, serial number OB9655687, I can not find on the serial number chart. One thing I see, is a seven digit serial number, with a OB prefix. The seven digit serial numbers, ( prior to 1985 ), had no prefix. Serial numbers with the prefix, ( OA,OB,OC, ect. ), have six digit serial numbers. Could there be an error in the serial number posted?