B2open up to sb/about sthspokeninformalMost common
To start talking more honestly or freely about your feelings, thoughts, or experiences.
It took a while, but eventually he opened up about his worries.
A: You seem quiet today. Is everything okay? B: I just need some time to open up about what's on my mind.
In my opinion, it's important for people to open up to their friends when they're feeling stressed, because talking can really help.
Common mistake
✗It took him a while to open up with me.
✓It took him a while to open up to me.
You 'open up TO someone', not 'with'.
Tell it apart
He finally opened up about his past.
talked honestly
He finally owned up to it.
admitted he did it
Use 'open up' when someone starts to share their true feelings or personal stories, especially after being quiet or reserved.Not the same as 'open up' meaning to make something accessible or available.
To make something available, accessible, or ready for use; to allow entry or opportunity.
The new train line will open up the region to more tourists.
A: When does the café open up in the morning? B: They usually open up at 7 a.m.
Technology has opened up many new ways for people to work from home, which was not possible in the past.
Common mistake
✗The cafe opens up at 8.
✓The cafe opens at 8.
For daily opening hours just say 'open' — 'open up' adds the feel of unlocking for the first time of day (informal).
Tell it apart
The reforms opened up the market.
made it accessible
The ban closed off the market.
shut it to outsiders
Use 'open up' when a place, opportunity, or possibility becomes available to people.Not about sharing feelings; this sense is about making something physically or metaphorically accessible.
C1open up sth opportunities/possibilities/markets/avenues for sb/sth
To create or increase new possibilities, opportunities, or areas for development, especially in a figurative or abstract sense (e.g. markets, options, perspectives).
The new trade agreement is expected to open up significant opportunities for local exporters.
A: Do you think studying abroad really makes a difference? B: Absolutely—it can open up a whole range of career options you might not have at home.
Implementing renewable energy technologies could open up new avenues for economic growth in developing countries.
Common mistake
✗It opened up me new opportunities.
✓It opened up new opportunities for me.
Put the beneficiary with 'for': 'open up opportunities FOR me'.
Tell it apart
The grant opened up new possibilities.
created opportunities
The cuts closed off our options.
shut them down
'Open up' in this sense is commonly used in formal and semi-formal contexts (business, academic, or discursive writing) to talk about expanding options or making new things possible, not about physical access or personal feelings.Unlike the B1 sense ('make access possible'), this sense is figurative and refers to the expansion of abstract opportunities, not physical spaces. It is also distinct from the B2 sense ('talk honestly'), which relates to personal communication.