transitive verb-·swore′ , -·sworn′, -·swear′ing
- to renounce on oath; promise earnestly to give up
- to deny earnestly or on oath
Origin of forswearMiddle English forswerien from Old English forswerian: see for- and swear
verbfor·swore, for·sworn, for·swear·ing, for·swears
- a. To decide or declare that one will not or will no longer engage in (an activity or habit, for example): a political group that has forsworn violence.b. To decide or declare that one will not or will no longer use or be associated with (something): “He had cast in his lot with the lions and forsworn the lambs” ( Robert Louis Stevenson )c. To disavow under oath: “He was forced to take an oath forswearing heretical views” ( Garry Wills )
- To make (oneself) guilty of perjury.
Origin of forswearMiddle English forsweren from Old English forswerian for- wrongly ; see for- . swerian to swear ; see swear .
(third-person singular simple present forswears, present participle forswearing, simple past forswore, past participle forsworn)
Middle English forsweren, from Old English forswerian (“to swear falsely”). More at for- + swear.