Translation

jirafu means "Giraffe" in English.
It's a katakanization, a loan-word.

jirafu is normally written with katakana, as ジラフ.
jirafu written with hiragana is じらふ.
jirafu does not have kanji.
Romaji ji ra fu
Katakana
Hiragana

Synonyms

Scientific name: Giraffa camelopardalis.

Further Reading

Wikipedia: 麒麟 (Giraffe)