1. Cause to open or to become open
   - open 
2. Become available
   "an opportunity opened up"
   - open 
3. Make available
   "This opens up new possibilities"
   - open 
4. Open up an area or prepare a way
   - pioneer 
5. Start to operate or function or cause to start operating or functioning
   - open 
6. Become open
   - open 
7. Talk freely and without inhibition

Derived forms: opened up, opening up, opens up

See also: open

Type of: afford, arise, change state, come up, give, innovate, introduce, mouth, speak, talk, turn, utter, verbalise [Brit], verbalize, yield

Antonym: close up

• sermonize
• sermonizer
• serologic
• serological
• serologist
• serology
• serosa
• serotine
• serotinous
• serotonin
• serotype
• serous
• serous membrane
• serovar
• serow
• Serpasil
• Serpens
• dirty tricks
• dirty war
• dirty word
• dirty-faced
• dirty-minded
• dirtying
• dis
• disa