すでsudeniすんでsundeni
1.

Indicates that something has been completed or reached a certain state before a particular point in time, suggesting that the action or condition is no longer in doubt or is now evident.

2.

Expresses that a situation has become apparent or a certain state has been attained earlier than expected, often implying the inevitability of that state.

3.

Conveys the idea that something is now established as a fact or that a notable change has occurred, indicating a definitive transition from a previous state to a new one.

4.

Describes a circumstance where an action or state was so close to happening that it could have easily occurred, often implying a sense of urgency or missed opportunity.

Example:

バス停に着いた時、バスはすでに出ていた。