Translation

raba means "Mule" in English.

raba is normally written with katakana, as ラバ.
raba written with hiragana is らば.
raba written with kanji is 騾馬.
This word contains non-jouyou kanji 常用漢字.
Romaji ra ba
Hiragana
Katakana
Kanji
Meaning Mule Horse
School Level 小2

Further Reading

Wikipedia: 騾馬 (Mule)