spontaneous (自発的な): The party was a spontaneous gathering of friends. (パーティーは友達が自発的に集まったものでした) - 試験に出る! 英単語検索辞書

spontaneous (自発的な): The party was a spontaneous gathering of friends. (パーティーは友達が自発的に集まったものでした)

The party was a spontaneous gathering of friends.