What does 大敵 mean?
大敵 is a Japanese noun meaning “arch enemy” in English. It is written as 大敵 in kanji, たいてき in hiragana, and taiteki in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
夜更かしはお肌の大敵だよ。
Staying up late at night is very bad for your skin.