1. (verb) open, open up
cause to open or to become open
Synonyms: give, open, pioneer, open up, afford, spread, spread out, unfold
Antonyms: belt up, be quiet, close up, dummy up, button up, shut up, clam up, keep mum
2. (verb) open, open up
become available
Synonyms: give, open, pioneer, open up, afford, spread, spread out, unfold
Antonyms: be quiet, belt up, clam up, button up, keep mum, shut up, close up, dummy up
3. (verb) open, open up
make available
Synonyms: give, open, pioneer, open up, afford, spread, spread out, unfold
Antonyms: clam up, dummy up, close up, belt up, keep mum, button up, shut up, be quiet
4. (verb) pioneer, open up
open up an area or prepare a way
Synonyms: open up, pioneer, open, initiate
Antonyms: button up, clam up, close up, keep mum, be quiet, dummy up, belt up, shut up
5. (verb) open, open up
start to operate or function or cause to start operating or functioning
Synonyms: give, open, pioneer, open up, afford, spread, spread out, unfold
Antonyms: belt up, clam up, close up, button up, be quiet, shut up, keep mum, dummy up
6. (verb) open, open up
become open
Synonyms: give, open, pioneer, open up, afford, spread, spread out, unfold
Antonyms: shut up, clam up, belt up, keep mum, dummy up, close up, button up, be quiet
7. (verb) open up
talk freely and without inhibition
Synonyms: open up, pioneer, open
Antonyms: button up, be quiet, belt up, shut up, close up, keep mum, dummy up, clam up
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Synonyms for open up 
