Refers to the animal Gulo gulo. The katakana spelling クズリ is standard.
The wolverine is a large mustelid that lives in the Arctic region.
Wolverines are very fierce and sometimes attack prey larger than themselves.
Katakana spelling is standard for this animal name; usually written in kana.
Ateji kanji form; rarely used in practice.
Ateji kanji form; rarely used in practice.
The Japanese word クズリ is likely derived from the Ainu language, but the exact origin is uncertain.