Translation

abu means "Horse-Fly" in English.

abu written with kanji is 虻.
This word contains non-jouyou kanji 常用漢字.
Romaji a bu
Hiraganaあぶ
Katakanaアブ
Kanji 虻
School Level ✕

abu may also be written as 蝱.

Further Reading

Wikipedia: アブ (Horse-fly)