Noah Webster's Dictionary 1. (v. i.) To dig in or under the ground, generally for an object that is difficult to reach or extricate; to be occupied in digging. 2. (v. i.) To drudge; to do menial work. 3. (v. t.) To dig; to dig up by the roots; to root out by digging; -- followed by up; as, to grub up trees, rushes, or sedge. 4. (v. t.) To supply with food. 5. (n.) The larva of an insect, especially of a beetle; -- called also grubworm. 6. (n.) A short, thick man; a dwarf. 7. (n.) Victuals; food.

Multi-Version Concordance Grub (2 Occurrences) Job 25:6 How much less man -- a grub, And the son of man -- a worm! (YLT) Isaiah 51:8 For like a coat they will be food for the insect, the worm will make a meal of them like wool: but my righteousness will be for ever, and my salvation to all generations. (See NAS)