swear [sweə(r)]

以下由轻松背单词网站提供

vt.发誓，宣誓，咒骂，使宣誓；vi. 发誓，诅咒；n.诅咒，誓言

to use words that are rude or offensive as a way of emphasizing what you mean or as a way of insulting someone or something

I swear I'll break you. 我发誓要搞垮你。
I swear it's true! 我起誓这是真的！