'sissy' originates from English, specifically the word 'sister,' where 'sis' was a diminutive form used to refer to a sister.

'sister' transformed into the colloquial term 'sissy' in the late 19th century, eventually becoming a term used to describe effeminate behavior.

Initially, it meant 'sister,' but over time it evolved into its current meaning of 'effeminate or cowardly person.'