feretto means "Ferret" in English.
It's a katakanization, a loan-word.

feretto in katakana is フェレット.
feretto is not usually written with hiragana.
feretto does not have kanji.
Romaji fe re tto
Katakana フェ

Orthography Notes

  • フェ is a compound kana representing a single syllable with multiple characters.
  • ット contains a small tsu ッ which makes the consonant of the syllable longer.
Wikipedia: フェレット


shiroitachi 白鼬.