swears [swɛəz]

以下由轻松背单词网站提供

附加级

v.诅咒，咒骂( swear的第三人称单数 )；（使某人）就…宣誓；郑重承诺；发誓要

My father swears by these vitamin pills. 我爸爸非常相信这些维他命药片。来自《简明英汉词典》
A witness swears by the Bible that he will tell the truth. 证人对着圣经发誓保证据实直言。来自辞典例句