What does 妖怪 mean?
妖怪 is a Japanese noun meaning “monster” in English. It is written as 妖怪 in kanji, ようかい in hiragana, and youkai in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
一匹の妖怪がヨーロッパを徘徊している。共産主義という妖怪が。
A spectre is haunting Europe ― the spectre of communism.