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English word sissy comes from Proto-Indo-European *swésōr (Sister.)
*swésōr (Proto-Indo-European)
Sister.
*swestēr (Proto-Germanic)
Sister.
sweostor (Old English)
A sister.
ᛊᚹᛖᛊᛏᚨᚱ (Proto-Norse)
Sister.
sweoster (Old English)
Sister.
systir (Old Norse)
Sister.
suster (Middle English)
sister (English)
(British) A senior or supervisory nurse, often in a hospital.. (attributively) An entity that has a special or affectionate, non-hierarchical relationship with another.. (informal) A form of address to a woman.. (slang) A black woman.. (usually, attributively) In the same class.. A daughter of the same parents as another person; a female sibling.. A female member of a religious order; [...]
sis (English)
(informal).
sissy (English)
(BDSM) A male crossdresser who adopts feminine behaviours.. (colloquial) Sister.. (pejorative, colloquial) A timid, unassertive or cowardly person.. (pejorative, colloquial) An effeminate boy or man. (pejorative) Cowardly.. (pejorative) Effeminate.