when

IPA(Pronunciation)

/ʍɛn/

Adverb

interrogative not-comparable relative in definitions or explanations informal

Japanese Meaning

「いつ？」― 時刻や時間、あるいは時期を尋ねる疑問詞 / 「どの時に／どの時点で？」― 特定の状況や機会を問う表現

She asked him when the train would arrive, but he didn't know.

彼女は列車が何時到着するか彼に尋ねたが、彼は知らなかった。

Sense（1）

When will they arrive?

Sense（2）

At an earlier time and under different, usually less favorable, circumstances.

He's mister high and mighty now, but I remember him when.

Sense（3）

(relative) At which, on which, during which: often omitted or replaced with that.

That was the day when the Twin Towers fell.

Sense（4）

(fused relative) The time at, on or during which.

I recall when they were called the Greys.

Sense（5）

(informal, in definitions or explanations) A circumstance or situation in which.

Love is when you can't get enough of someone.