Translation

arigētā means "Alligator" in English.
It's a katakanization, a loan-word.

arigētā is normally written with katakana, as アリゲーター.
arigētā written with hiragana is ありげーたー.
arigētā does not have kanji.
Romaji a ri gee taa
Katakana
Hiragana

Orthography Notes

Further Reading