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to fog up
01
(of glass, mirrors, lenses, and other such surfaces) to become covered by fog
Grammatical Information
Composition
phrasal
Action verb
Regular
Inseparable
Particle
up
Base verb
fog
Present tense
fog up
3rd person singular
fogs up
Present participle
fogging up
Past simple
fogged up
Past participle
fogged up
Examples
The bathroom mirror fogged up after a hot shower.
02
to cover something with very small water droplets, resulting in a mist on its surface
Examples
A cold drink can cause the outside of the glass to fog up on a warm day.
