際には
sai ni wa
JA
when; at the time of; on the occasion of
出かける際には、鍵をかけてください。
Please lock the door when you go out.
Etymology
Derived from the Old Japanese word さい (sai), originally meaning 'edge' or 'boundary', which evolved to refer to a point in time when an event occurs.
Memory Aid
Think of 'sai' as the 'side' of an event, so 際には refers to when you are at the side (time) of an action happening.
Collocations
行く際には利用する際には訪問する際には
Synonyms
ときには場合には
Related Words
際際立つ会際