Translation guide
The English word "maggot" refers to the larval stage of a fly. In Japanese, the most common and general term is うじ (蛆). There are also more specific or literary terms, but for everyday use, うじ is the recommended word.
Referring to the soft-bodied, legless larva of a fly, typically found in decaying matter.
The standard, everyday word for a maggot. Used in both spoken and written Japanese.
Maggots were breeding in the trash can.
Maggots can infest wounds.
Katakana form of 蛆, often used in biological or medical contexts, or for emphasis.
Maggots are the larvae of flies.
Specifically referring to maggots used as fishing bait.
Referring to the use of sterile maggots in medicine to clean wounds.
The loanword from English, used in medical contexts.
Maggot therapy is effective for removing necrotic tissue.
The Japanese term for maggot therapy, literally 'maggot treatment'.
Maggot therapy has been practiced since ancient times.
Using 'maggot' as an insult for a despicable person.
Literally 'maggot insect', used as a strong insult for a worthless person. Rare and very derogatory.
This is a harsh insult and not commonly used in modern Japanese. Avoid unless you intend to be extremely offensive.
Don't bother with that maggot of a guy.
While English uses 'maggot' as an insult, Japanese rarely uses 蛆 (うじ) in this way. The word 蛆虫 (うじむし) exists but is very strong and uncommon. More typical Japanese insults focus on stupidity or uselessness (e.g., 役立たず, くず).
Go buy some maggots (for fishing).