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その会合に出席しなかった

did not attend that meeting

→ 其の
phrase Rare #37,434
did not attend that meeting A past negative phrase meaning that someone did not attend a particular meeting. その means “that,” 会合 means “meeting,” and 出席しなかった is the past negative form of 出席する, “to attend.”
JA: 忙しかったので、その会合に出席しなかった。
EN: I was busy, so I didn't attend that meeting.

そういうわけで彼はその会合に出席しなかった。

That's why he didn't attend the meeting.

彼らのうち、誰もその会合に出席しなかった。

None of them attended the meeting.

私はその会合に出席しなかったし、彼も出席しなかった。

I didn’t attend the meeting, and neither did he.

彼女は前の夫に会うのが怖くて、その会合に出席しなかった。

She was afraid of seeing her ex-husband, so she didn't attend the meeting.