Translation

ratte means "Rat" in English.
It's a katakanization, a loan-word.
It comes from "Ratte," from German.

ratte is normally written with katakana, as ラッテ.
ratte written with hiragana is らって.
ratte does not have kanji.
Romaji ra tte
Katakanaラッテ
Hiraganaらって

Orthography Notes

  • ッテ contains a small tsu ッ which makes the consonant of the syllable longer.