1. insect; bug; cricket; moth
虫に食われて倒れる木だってあるんだし。There are even trees that fall over because they are eaten by insects.
2. worm; roundworm
3. thing inside one's body believed to influence one's thoughts and feelings; (one's) unconscious
from a traditional belief of an internal insect
4. nervousness; fretfulness
5. person devoted to one thing; single-minded person
6. valve core
7. mushi (type of game played with a stripped deck)