open
Please open the window; it's hot in here.
Forms
opens 3rd-person singular
She opens the shop at nine every morning.
opened past / past participle
He opened the letter slowly.
opening present participle / gerund
Opening the windows helped cool the room.
opening noun
There's an opening for a marketing assistant at the company.
opener noun
Use a bottle opener to remove the cap.
openly adverb
She spoke openly about her plans for the future.
Phrasal verbs
open up
To make accessible or available; to begin operating or to reveal more details.
The gallery will open up the new wing next month.
open up to
To begin to talk about personal feelings with someone or to become receptive.
After a few sessions, he opened up to his therapist about his worries.
open onto
To lead directly into (used of doors, windows, or passages).
The kitchen door opens onto a small courtyard.
open out
To unfold or spread something out; (also) to expand or develop (more common in British English).
She opened the map out on the table to check the route.