1.
action; effect; function
The process by which something influences or affects something else; the operating mechanism of something.
この薬には副作用がある。
This medicine has side effects.
重力の作用で物は落ちる。
Objects fall due to the action of gravity.
消化作用を助ける。
To aid digestive function.
COMMON COLLOCATIONS:
- 副作用: side effect
- 相互作用: interaction
- 作用を及ぼす: to exert an effect
- 作用する: to act upon, function
- 心理作用: psychological effect
SCIENTIFIC CONTEXTS:
- 化学作用: chemical action
- 光合成作用: photosynthesis
- 酵素作用: enzyme action
PRINCIPLE:
- 作用反作用の法則: Newton's third law (action-reaction)