Know why cattywampus was trending last week?
"self-cremation of a Hindu widow on her husband's funeral pyre," 1786, from Hindi, from Sanskrit sati "virtuous woman," fem. of sat "good, wise," literally "existing," present participle of asmi "I am" (cognate with Latin esse; see essence). Properly, the word for the woman who does so. The custom was abolished in British India in 1829.