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party (social gathering)
party (group of people participating in an activity, esp. mountain climbing)
(political) party
今度の土曜日にパーティーをします。
We're having a party this Saturday.
友達の誕生日パーティーに行きました。
I went to my friend's birthday party.
パーティーの準備を手伝います。
I will help prepare for the party.