Cain

A very versatile reflexive expression. Can mean to assume responsibility, to manage a situation, or to understand/grasp something depending on context. Here used in the sense of taking moral responsibility.

Fixed expression used to ask whether someone has been briefed or kept in the loop. Common in both professional and personal contexts.

Exclamation expressing surprise, disbelief, or mild exasperation. Of Arabic origin, retained in everyday informal speech. Characteristic of colloquial spoken register.

Originally nautical ('at full engine power') but now used broadly to mean doing something as fast as possible. Works both literally and figuratively.

A fixed rhetorical opener that signals the speaker is frustrated or incredulous. Despite its literal meaning ('may one know?'), it functions as an emphatic question expressing strong emotion rather than a polite inquiry.

When used between two people who have exchanged favours or resolved a debt, emotional or financial, 'estar en paz' means neither owes the other anything. Distinct from the more literal 'peace and quiet' meaning.