ˈman|swȯ(ə)rn, -swȯ(ə)n adjective
Etymology: Middle English, from past participle of mansweren to swear falsely, from Old English mānswerian, from mān crime, guilt, sin, false oath + swerian to swear; akin to Old Frisian & Old Saxon mēn crime, guilt, false oath, Old High German & Old Norse mein crime, guilt, false oath, Old English mān, adjective, criminal, bad, false — more at mean
now dialect : forsworn , perjured