1.
instant, moment, split second
An extremely short period of time. Emphasizes how quickly something happens.
Usage
Almost always used adverbially with に: 瞬時に (in an instant, instantly). Emphasizes that something happens in a split second, often highlighting quick reflexes, fast processing, or immediate reactions.
Common collocations
- 瞬時に判断する: to judge instantly
- 瞬時に反応する: to react instantly
- 瞬時に理解する: to understand instantly
- 瞬時に消える: to vanish in an instant