1.
simultaneous, at the same time
Occurring or done at the same moment in time.
同時 means "the same time" or "simultaneous." Composed of 同 (same) + 時 (time). Functions as a noun but commonly used adverbially with に.
KEY PATTERNS:
- 同時に: at the same time
- ～と同時に: at the same time as ~; while also ~
- それと同時に: at the same time (conjunctive, connecting two events)
COMMON COMPOUNDS:
- 同時通訳: simultaneous interpretation
- 同時進行: simultaneous progress, running in parallel
- 同時多発: occurring simultaneously in multiple places
- 同時開催: held at the same time
GRAMMAR NOTE:
～と同時に is frequently used as a conjunction meaning "at the same time as" or "while also." It can connect two simultaneous actions or add a second related point: 便利であると同時に危険でもある (it is convenient but at the same time also dangerous).