Longman Dictionary of Contemporary English homepage

grub

2 verb
     
grub2 past tense and past participle grubbed, present participle grubbing [intransitive always + adverb/preposition]
informal to look for something on the ground or just under the ground, especially by moving things around:
Jake got on the floor and grubbed about under the desk.
grub for
chickens grubbing for worms

grub something ↔ up/out

phrasal verb
to dig plants out of the ground:
Farmers were encouraged to grub up hedgerows.

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