fog up

US /fɑːɡ ʌp/
UK /fɑːɡ ʌp/
"fog up" picture
1.

to cover with a film of condensed water vapor, as from breath or steam, making it difficult to see through

:
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The bathroom mirror always fogs up after a hot shower.
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My glasses fogged up when I came inside from the cold.
:
mist upsteam upcloud overhaze overblur
2.

to become confused or unclear in thought or understanding

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My mind tends to fog up when I'm tired.
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The complex instructions made my brain fog up.
:
confuseobscuremuddlebewilderperplex
:
fogfog lampon the up and upupup tocome up withfollow up