What does 大昔 mean?
大昔 is a Japanese noun meaning “ancient times, the distant past” in English. It is written as 大昔 in kanji, おおむかし in hiragana, and oomukashi in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
人間は大昔に道具の使用を覚えた。
Man learned early to use tools.