pointlessly
/ˈpɔɪntləsli/ 11in a way that has no purpose and is a waste of time: Innocent lives were cruelly and pointlessly wiped out.
adverb [方式副词]不相干地；漫无目标地；不得要领地（pointless 的副词形式）
He argued pointlessly with his parents.他无谓地和父母争论。
单词造句:
He argued pointlessly with his parents.他无谓地和父母争论。