"How to say 'open' in English?"
In English, "open" is the past tense and past participle of the verb "open." It can be used as an adjective to describe something that is not closed or sealed. For example, "Please open the door" or "The window is open." As an adverb, it can be used to indicate the act of opening something, such as "She opened the package carefully." Additionally, "open" can be used as a noun, meaning a gap or space between two things. For example, "There was an open space in the fence."
