open up
HighNeutral to informal (depending on context). Frequent in business, everyday, and personal contexts.
Definition
Meaning
To make something accessible, available, or revealed; to begin operating or becoming available.
To become more communicative, emotionally expressive, or vulnerable; to create new opportunities or markets; to accelerate.
Linguistics
Semantic Notes
Phrasal verb, separable. Literal meaning involves physical opening; figurative meanings are very common. Can imply a positive change (opportunities, communication) or negative (vulnerability to attack).
Dialectal Variation
British vs American Usage
Differences
Minimal lexical difference. 'Open up' is used similarly in both varieties. Slight preference in US English for 'open up' in business contexts ('open up a new market').
Connotations
Similar connotations in both varieties.
Frequency
Equally frequent and natural in both BrE and AmE.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] opens up [Object] (e.g., The policy opens up trade).[Subject] opens up to [Indirect Object] (e.g., She opened up to her friend).[Subject] opens up (intransitive) (e.g., New opportunities opened up).Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Open up a can of worms”
- “Open up shop”
- “The heavens opened up.”
Usage
Context Usage
Business
Refers to accessing new markets, starting new ventures, or increasing trade. 'The agreement will open up the Asian sector for us.'
Academic
Used to discuss revealing new avenues of research or theoretical possibilities. 'His work opened up a new field of study.'
Everyday
Common for emotional sharing, starting a business, or literal opening. 'It took time for him to open up about his feelings.'
Technical
In computing, to launch a program or file. In medicine/surgery, to make an incision. 'The surgeon will open up the chest cavity.'
Examples
By Part of Speech
verb
British English
- The new rail link will open up the region to tourism.
- He finally opened up to his therapist.
- They're planning to open up a café in Cornwall.
American English
- The trade deal opens up markets for US farmers.
- She found it hard to open up at first.
- They opened up a huge lead in the third quarter.
adverb
British English
- N/A (phrasal verb, not standard adverb).
American English
- N/A (phrasal verb, not standard adverb).
adjective
British English
- N/A (phrasal verb, not standard adjective). 'Open-up' is not a standard adjective.
American English
- N/A (phrasal verb, not standard adjective).
Examples
By CEFR Level
- Please open up the window, it's hot.
- The shop opens up at nine o'clock.
- The new highway opens up a faster route to the coast.
- It's good to open up to friends when you have a problem.
- The internet has opened up incredible possibilities for global communication.
- The investigation opened up a series of unanswered questions.
- Her groundbreaking research opened up hitherto unexplored epistemological avenues.
- The ceasefire created a brief window to open up humanitarian corridors.
Learning
Memory Aids
Mnemonic
Think of a flower bud OPENING UP to the sun. It becomes accessible, reveals its beauty, and starts a new phase of life—just like the phrasal verb's meanings.
Conceptual Metaphor
ACCESSIBILITY IS OPENNESS; EMOTIONAL VULNERABILITY IS BEING PHYSICALLY OPEN; OPPORTUNITIES ARE OPEN PATHS/DOORS.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate as 'открыть вверх'. It's a unit.
- For emotional meaning ('open up to someone'), use 'раскрыться', 'откровенничать', not just 'открыть'.
- For 'open up a business', use 'открыть дело/бизнес', not 'открыть вверх'.
Common Mistakes
- *I opened up him about my problem. (Correct: I opened up TO him...)
- *The government opened the country up for tourism. (Acceptable but less common than 'opened up the country')
- Using it redundantly where 'open' is sufficient (e.g., *'Open up the window' vs. 'Open the window').
Practice
Quiz
In a business context, 'to open up a market' primarily means:
FAQ
Frequently Asked Questions
Yes, it is separable. You can say 'open up the box' or 'open the box up'. However, when followed by a prepositional phrase (e.g., 'to someone'), it is not separated ('open up to me', NOT 'open to me up').
Often minimal. 'Open up' can emphasize the process, the resulting availability, or the figurative meaning. 'Open the door' is literal; 'open up the country' suggests making it accessible in a broader sense. For emotional sharing, only 'open up' is used.
Yes. It can mean to make vulnerable ('The flank was opened up to attack') or to revisit painful issues ('The discussion opened up old wounds').
It is neutral. It is perfectly acceptable in business and academic writing when used figuratively (e.g., 'open up new possibilities'). In very formal legal or technical documents, a single verb like 'initiate' or 'reveal' might be preferred.