اختصار

To think, to believe.

I apologize, to express regret for an offense or error.

To apologize, to excuse oneself.

You're welcome; excuse me; pardon me.

You're welcome, excuse me (polite response or apology)

Nevertheless; however.

Excuse, apology (reason for an action).

Excuse me, sorry; used to apologize or get attention.

A recommendation offered as a guide to action or conduct.

Understand! (command to grasp meaning)