verb

entretenir

maintain

Prendre soin de quelque chose ou de quelqu’un pour qu’il reste en bon état ou continue de bien fonctionner.

The verb entretenir is a versatile French term with several related meanings:

To maintain or keep in good condition: This refers to the act of preserving something, keeping it in working order, or preventing it from deteriorating. For example, maintaining a building, a machine, or a garden.
To keep, support, or provide for: This refers to providing the necessary means (usually financial) for someone to live or for something to continue existing. It can refer to supporting a family or funding an organization.
To hold or keep up (a relationship or a state of mind): This refers to maintaining contact, a conversation, a hope, or a feeling. For example, keeping a conversation going or maintaining a long-distance friendship.
To entertain (reflexive form s'entretenir): When used reflexively, it often means to have a formal conversation or a meeting with someone (e.g., s'entretenir avec le directeur).

Grammar: It is a transitive verb that follows the conjugation patterns of the verb tenir . It is a third-group verb.
Word origin: It is derived from the prefix entre- (between/among) and the verb tenir (to hold). Etymologically, it implies "holding between" or "holding together," which evolved into the modern concept of keeping something in a sustained state.