suttee
noun
sut·tee (ˌ)sə-ˈtē 
ˈsə-ˌtē
variants or less commonly sati
: the act or custom of a Hindu widow burning herself to death or being burned to death on the funeral pyre of her husband
also : a woman burned to death in this way
Word History
Etymology
Hindi satī wife who performs suttee, from Sanskrit, devoted woman, from feminine of sat true, good; akin to Old English sōth true — more at sooth
First Known Use
1786, in the meaning defined above