I. dredge /dredʒ/ verb
[Date: 1500-1600; Origin: Perhaps from Old English dragan 'to pull']

1. [intransitive and transitive] to remove mud or sand from the bottom of a river, harbour etc, or to search for something by doing this:
They dredged for oysters.

2. [transitive + with] to cover food lightly with flour, sugar etc
dredge something ↔ up phrasal verb

1. to start talking again about something that happened a long time ago, especially something unpleasant:
Newsweek magazine dredged up some remarks which he made last year.

2. to manage to remember something, or to feel or express an emotion, with difficulty:
Robertson tried to dredge up an image of her in his mind.
From somewhere she dredged up a brilliant smile.

3. to pull something up from the bottom of a river, lake etc

[TahlilGaran] Dictionary of Contemporary English ▲

II. dredg‧er /ˈdredʒə $ -ər/ (also dredge) noun [countable]
a machine or ship used for digging or removing mud and sand from the bottom of a river, lake etc

[TahlilGaran] Dictionary of Contemporary English ▲