opine
- v express one's opinion openly and without fear or hesitation
- v expect, believe, or suppose
opalize
- v make opalescent
- v replace or convert into opal
opalized tree trunks
open up
- v cause to open or to become open
- v become available
- v make available
- v open up an area or prepare a way
- v start to operate or function or cause to start operating or functioning
- v become open
- v talk freely and without inhibition
operate
- v direct or control; projects, businesses, etc.
- v perform as expected when applied
- v handle and cause to function
do not operate machinery after imbibing alcohol - v perform a movement in military or naval tactics in order to secure an advantage in attack or defense
- v happen
- v keep engaged
- v perform surgery on
The doctors operated on the patient but failed to save his life
oppose
- v be against; express opposition to
We oppose the ban on abortion - v fight against or resist strongly
The senator said he would oppose the bill - v contrast with equal weight or force
- v set into opposition or rivalry
- v act against or in opposition to
- v be resistant to
The board opposed his motion
oppress
- v come down on or keep down by unjust use of one's authority
The government oppresses political activists - v cause to suffer