English · Phrasal verb Attested

frost up

In real, traceable use. Part of the curated seed collection; community review is coming.

Both English Tiếng Việt

Meaning · English

to become frosty

Nghĩa · Tiếng Việt

trở nên giá lạnh

Machine-translated — suggest a fix

Where it’s used: Used American English

The windows often frost up in winter.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Common questions

What does “frost up” mean?

to become frosty

Is “frost up” formal or informal?

No register label has been reviewed yet — treat it as neutral and check the usage notes above.

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