sis

[sis]
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Origin of sis

1825–35, Americanism; shortened form; compare Dutch zus for zuster sister

-sis

  1. a suffix appearing in loanwords from Greek, where it was used to form from verbs abstract nouns of action, process, state, condition, etc.: thesis; aphesis.

Origin of -sis

From Greek
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British Dictionary definitions for sis

sis

1
noun
  1. informal short for sister

sis

2

sies

interjection
  1. Southern African informal an exclamation of disgust

Word Origin for sis

Afrikaans, possibly from Khoi

SIS

abbreviation for
  1. Also called: MI6 (in Britain) Secret Intelligence Service
  2. (in New Zealand) Security Intelligence Service
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 sis
n.

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.

-sis

suffix in Greek-derived nouns denoting action, process, state, condition, from Greek -sis, which is identical in meaning with Latin -entia, English -ing (1).

Online Etymology Dictionary, © 2010 Douglas Harper