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dredge up

B2 informal separable transitive
In simple words

To dig up something bad from the past — like an old argument or a dark secret — that people didn't want to think about again.

Literal meaning: To use a dredge (a digging machine) to bring material up from the bottom of a river or sea.

Meanings

1 B2 idiomatic informal

To bring unpleasant or embarrassing information or memories to people's attention, especially after a long time.

"The tabloids dredged up every old scandal they could find before the election."

Grammar: separable
2 B2 idiomatic informal

To recall or retrieve something from memory with great effort.

"She tried to dredge up her high school French for the conversation."

Grammar: separable
Usage notes

Strongly implies that the material being retrieved is unpleasant, embarrassing, or painful. The metaphor comes from dredging a river or harbour — dragging up what has sunk to the bottom. Often used in journalism and gossip contexts.

Commonly used with

past memories scandal story accusation old argument

Forms

Base
dredge up
I/you/we/they
3rd person
dredges up
he/she/it
Past simple
dredged up
yesterday
Past participle
dredged up
have + pp
-ing form
dredging up
continuous

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