Translation

wani means "Crocodile" or "Alligator" in English.

wani is normally written with katakana, as ワニ.
wani written with hiragana is わに.
wani written with kanji is .
This word contains non-jouyou kanji 常用漢字.
Romaji wa ni
Hiragana
Katakana
Kanji
School Level

Further Reading

Wikipedia: ワニ