This is the 10022nd most frequent Catalan word.
obri
"Obri" is the third-person singular present subjunctive or formal imperative form of "obrir," meaning "open."
The verb 'obri' here is used to indicate the action of opening something (the door) in the third person singular present tense.
Ell obri la porta.
He opens the door.
In this context, 'obri' is used in the imperative form directed towards one person, instructing them to perform an action.
Si us plau, obri aquest llibre i llegeix el primer capítol.
Please, open this book and read the first chapter.
The word 'obri' here is used as a verb in the subjunctive mood to indicate an action that is expected or anticipated in a future or hypothetical context.