Indicates someone's arrival without prior notice, often surprising others.

Spontaneous Arrival

Used when attending events casually, without making firm plans.

Causal Event

Refers to finding something by chance rather than a deliberate search.

Suggests a good result or solution appearing after a challenging problem.

A polite way to ask someone to increase the level of something.

Refers to making a device operate at a higher level or intensity.

Something hidden becomes visible after an action or event.

Implies revealing something concealed, often of value or importance.

Used when someone or something appears unexpectedly, causing surprise.

Often used when someone arrives without informing hosts in advance.