IPA: //ˈɡrʌbər//
KK: /ˈgrʌbər/
A person or thing that digs or removes something from the ground, often used in the context of gardening or agriculture.
The grubber was used to clear the weeds from the garden bed.
Grubber originates from the Old English 'grubban', meaning to dig or to search. The word refers to someone who digs or searches, often in a persistent or thorough manner.
Think of someone who is 'digging' ('grubban') for something, which helps you remember that a grubber is someone who searches or digs for things.