Jump to:

• sis
  sis

  noun

  sister.
• -sis
  -sis

  a suffix appearing in loanwords from Greek, where it was used to form from verbs abstract nouns of action, process, state, condition, etc..
• SIS
  SIS

  abbreviation

  (in Britain) Secret Intelligence Service

sis

¹ American  

[sis] / sɪs /

noun

Informal.

1. sister.

---

-sis ² American  

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.

---

SIS ¹ British  

abbreviation

1. Also called: MI6.  (in Britain) Secret Intelligence Service

2. (in New Zealand) Security Intelligence Service

---

sis ² British  

/ sɪs /

noun

1. informal short for sister

---

sis ³ British  

/ siːs, sɪs /

interjection

1. informal an exclamation of disgust

---

Etymology

Origin of sis¹

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

Origin of -sis²

From Greek

Related Words

• buddy
• comrade
• crony
• playmate