1.
oxygen-free; anaerobic
A state or condition without oxygen. Used in scientific contexts for processes that occur without oxygen, and in mountaineering for climbing without supplemental oxygen tanks.
Anaerobic exercise is effective for building muscle strength in a short time.
Usage
The prefix 無～ means "without" and attaches to many Sino-Japanese nouns. Used in two main contexts: (1) mountaineering — climbing without supplemental oxygen (無酸素登頂), and (2) science — anaerobic conditions or exercise.
Common collocations
- 無酸素登頂 (oxygen-free summit, climbing without supplemental O₂)
- 無酸素運動 (anaerobic exercise)
- 無酸素状態 (oxygen-free state)