Translation

haiena means "Hyena" in English.
It's a katakanization, a loan-word.

haiena is normally written with katakana, as ハイエナ.
haiena written with hiragana is はいえな.
haiena does not have kanji.
Romaji ha i e na
Katakana
Hiragana

Further Reading

Wikipedia: ハイエナ (Hyena)