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sis

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noun \ˈsis\

Definition of sis

  1. :  sister —usually used in direct address



1656

First Known Use of sis

1656

Rhymes with sis


SIS

abbreviation

Definition of SIS

  1. Secret Intelligence Service (British)




-sis

noun suffix,

Definition of -sis

plural -ses

  1. :  process :  action <peristalsis>



Origin of -sis

Latin, from Greek, feminine suffix of action


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