英和和英

open

to burst open

open wide

to disclose

reeve an opening

open weave

come open suddenly

open formally

slightly open

something to be opened

to open up

become open

being widely open

to open widely

to push open

to extract the square root （of a number）

a splayed opening

split open

to throw open

to force something open

to start a ceremony

open violently

to feel relieved―feel relief

open involuntarily

to open completely

evolution and involution

The curtain rises

The plays begins

The performance commences.

to open something up