pitch-dark
🇺🇸
/ˌpɪtʃ ˈdɑːrk/
🇬🇧
/ˌpɪtʃ ˈdɑːk/
So dark that you can't see anything
The forest path was pitch-dark at night, making it difficult to navigate.
森の小道は夜には真っ暗で、進むのが難しかった。