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.
エベレストを無酸素で登頂した。
He summited Everest without supplemental oxygen.
無酸素運動は短時間で筋力を鍛えるのに効果的だ。
Anaerobic exercise is effective for building muscle strength in a short time.
無酸素状態では、特定の細菌だけが生存できる。
In an oxygen-free environment, only certain bacteria can survive.
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)
SIMILAR WORDS:
- 有酸素: aerobic — the opposite
- 有酸素運動: aerobic exercise