Origin of sis
1825–35, Americanism; shortened form; compare Dutch zus for zuster sister
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for sises
Cf. 'At Sessions and at Sises we bare the stroke and swaye.'
- Also called: MI6 (in Britain) Secret Intelligence Service
- (in New Zealand) Security Intelligence Service
- informal short for sister
- Southern African informal an exclamation of disgust
Afrikaans, possibly from Khoi
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for sises
1650s, abbreviated form of sister; in American English, applied generally to girls and young women (1859). It also was the familiar short form of Cecilie, Cicely, a common name for girls in the Middle English period.
Online Etymology Dictionary, © 2010 Douglas Harper