Last modified on 26 December 2014, at 22:47


See also: -ītis, itis, and itiş



From New Latin -itis, from Ancient Greek -ῖτις (-îtis, pertaining to). This is the feminine form of adjectival suffix -ίτης (-ítēs) because it was used with the feminine noun νόσος (nósos, disease), particularly with ἀρθρῖτις (νόσος) (arthrîtis (nósos), disease of the joints) (one of the earliest English borrowings from which the suffix was extracted and abstracted).[1] Humorous sense by generalization.


-itis (usually uncountable, sometimes -itides or rarely -itises)

  1. (pathology) Suffix denoting diseases characterized by inflammation, itself often caused by an infection.
  2. (humorous) Used to form the names of various fictitious afflictions or diseases.
    • What to Do About Senioritis: Make Your Senior Year Count, College Board. Accessed April 4, 2008.[2]

Usage notesEdit

While most of the derived terms theoretically have plurals in -itides (from the Ancient Greek -ῑ́τῐδες (-ī́tides), plural of -ῖτῐς (-îtis)) and a few in -itises (the standardized English plural), these forms are rarely used as the derived terms describe conditions but rarely specific instances of those conditions.

Derived termsEdit




  1. ^ -itis.
  2. ^ What to Do About Senioritis: Make Your Senior Year Count

External linksEdit





  1. dative plural of -ītēs
  2. ablative plural of -ītēs