spontán

Describing an action, decision, or event that happens suddenly and naturally, without prior planning or pressure from others.

Describing a person, behavior, or emotion that is open, relaxed, and genuine, not controlled or rehearsed.

In medical or scientific contexts, describing a process or event that occurs by itself, without an identifiable external trigger, treatment, or deliberate action.

In chemistry and physics, describing a process or reaction that can proceed on its own under given conditions because it is thermodynamically favorable, without continuous input of energy.

In a way that happens suddenly and naturally, without being planned, prepared, or prompted by someone else.

In a way that is natural and unplanned, especially without posing for a photograph or recording.

In a way that happens on its own, without being caused or started by an outside force or intervention.