# -itis
## English
### Etymology

From New Latin -itis, from Ancient Greek -ῖτις (-îtis, “pertaining to”). This is the feminine form of adjectival suffix -ῑ́της (-ī́tēs). The English suffix derives from the feminine form due to its use 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). Humorous sense by generalization.

### Pronunciation

* IPA: /-ˈaɪtɪs/
* Audio (Southern England):(file)

### Suffix

-itis (usually uncountable, plural sometimes -itides or rarely -itises)
* (pathology) Suffix denoting diseases characterized by inflammation, itself often caused by an infection.
* (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.

#### Usage notes

* While most of the derived terms theoretically have plurals in -itides (from the Ancient Greek -ῑ́τῐδες (-ī́tĭdes), plural of -ῖτῐς (-îtĭs)), -itises (the regularized English plural), or both, these forms are rarely used, as the derived terms are mass nouns, so their plurals are called for only when referring to types. For example, hepatitides or hepatitises as "types of hepatitis" have some currency in the medical literature, but most other such plurals do not. There is a tendency in formal writing to prefer the classical suffix (when a plural is invoked at all); a typical example is that for the plural of arthritis referring to various types of arthritis, only arthritides is standard.

#### Derived terms

* adenitis (inflammation of the adenoids)
* adnexitis
* alveolitis (inflammation of the alveoli)
* angiitis
* apocrinitis
* appendicitis (inflammation of the appendix)
* arthritis
* balanitis
* blepharitis (inflammation of the eye)
* bronchiolitis
* bronchitis
* bronchoalveolitis
* bronchopneumonitis
* bursitis
* cellulitis
* cholangitis
* cholecystitis
* colitis
* conjunctivitis (inflammation of the conjunctiva)
* cystitis
* dermatitis (inflammation of the skin)
* diverticulitis
* encephalitis
* endocarditis
* endocervicitis
* enteritis
* enterocolitis
* epicondylitis
* epididymitis
* esophagitis
* fibrositis
* folliculitis
* gastritis
* gastroenteritis
* gingivitis
* glomerulonephritis
* glossitis
* hepatitis (inflammation of the liver)
* ileitis
* iridocyclitis
* iritis
* keratitis
* keratoconjunctivitis
* laryngitis
* leptomeningitis
* lymphangitis (inflammation of the lymph glands)
* mastitis
* mastoiditis
* meningitis
* myocarditis
* myositis
* nephritis
* neuritis
* neurodermatitis
* odontobothritis
* oesophagitis
* oophoritis
* orchitis
* osteoarthritis
* osteomyelitis
* otitis
* pachymeningitis
* pancreatitis
* panniculitis
* papillitis
* parotiditis
* parotitis
* pelvitis
* periarthritis
* pericarditis
* peritonitis
* pharyngitis
* phlebitis
* plantar fasciitis
* poliomyelitis
* polyarthritis
* polyneuritis
* proctitis
* prostatitis
* pyelitis
* pyelonephritis
* retinitis
* rhinitis
* rhinopharyngitis
* salpingitis
* sinusitis
* spondylitis
* stomatitis
* synovitis
* tendinitis
* tenosynovitis
* thrombophlebitis
* thyroiditis
* tonsillitis
* tracheitis
* urethritis
* uveitis
* vaginitis
* vasculitis
* vulvovaginitis
* Americanitis
* computeritis
* egoitis
* featuritis
* imaginitis
* lazyitis
* meetingitis
* Mondayitis
* Oblomovitis
* senioritis
* sequelitis
* teleportitis

#### Descendants

* itis

#### Translations
### References

* ↑ -itis. Dictionary.com.
* ↑ “What to Do About Senioritis: Make Your Senior Year Count”, in (Please provide the book title or journal name)‎, 2018 November 26 (last accessed), archived from the original on 1 March 2009

### Further reading

* English dictionary of medical terms

### Anagrams

* IIST, IITs, SITI, is it

## Catalan
### Etymology

From New Latin -ītis, from Ancient Greek -ῖτις (-îtis).

### Suffix

-itis f (noun-forming suffix, invariable)
* (pathology) -itis

#### Derived terms
### Further reading

* “-itis” in Diccionari de la llengua catalana, segona edició, Institut d’Estudis Catalans.
* “-itis”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2025
* “-itis” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.

## German
### Pronunciation

* Audio:(file)
* Audio:(file)

### Suffix

-itis f
* -itis

#### Derived terms
## Interlingua
### Etymology

Borrowed from English -itis, French -itis, Italian -ite, Portuguese -ite/Spanish -itis, Russian -ит (-it), all ultimately from New Latin -itis, from Ancient Greek -ῖτις (-îtis).

### Pronunciation

* IPA: /ˈitis/

### Suffix

-itis
* forms nouns from nouns, denoting an inflammitory disease; -itis
    ‎appendice (“appendix”) + ‎-itis → ‎appendicitis (“appendicitis”)
    ‎esophago (“oesophagus”) + ‎-itis → ‎esophagitis (“oesophagitis”)
    ‎larynge (“larynx”) + ‎-itis → ‎laryngitis (“laryngitis”)

#### Derived terms
### References

* Alexander Gode, Hugh E. Blair (1955) Interlingua: A Grammar of the International Language, →ISBN

## Latin
### Etymology 1

Learned borrowing from Ancient Greek -ῖτις (-îtis, “pertaining to”).

#### Pronunciation

* (Classical Latin) IPA: /ˈiː.tis/, [ˈiːt̪ɪs̠]
* (modern Italianate Ecclesiastical) IPA: /ˈi.tis/, [ˈiːt̪is]

#### Suffix

-ītis f (genitive -ītidis); third declension
* (New Latin, pathology) -itis (suffix denoting diseases characterized by inflammation, itself often caused by an infection)

##### Declension

Third-declension noun.

##### Derived terms
### Etymology 2

See the etymology of the corresponding lemma form.

#### Pronunciation

* (Classical Latin) IPA: /ˈiː.tiːs/, [ˈiːt̪iːs̠]
* (modern Italianate Ecclesiastical) IPA: /ˈi.tis/, [ˈiːt̪is]

#### Suffix

-ītīs
* dative/ablative plural of -ītēs

### Etymology 3

See the etymology of the corresponding lemma form.

#### Pronunciation

* (Classical Latin) IPA: /ˈiː.tiːs/, [ˈiːt̪iːs̠]
* (modern Italianate Ecclesiastical) IPA: /ˈi.tis/, [ˈiːt̪is]

#### Suffix

-ītīs
* dative/ablative masculine/feminine/neuter plural of -ītus

### Etymology 4

See the etymology of the corresponding lemma form.

#### Pronunciation

* (Classical Latin) IPA: /i.tiːs/, [ɪt̪iːs̠]
* (modern Italianate Ecclesiastical) IPA: /i.tis/, [it̪is]

#### Suffix

-itīs
* dative/ablative masculine/feminine/neuter plural of -itus

## Spanish
### Etymology

Borrowed from New Latin -ītis, from Ancient Greek -ῖτις (-îtis, “pertaining to”).

### Suffix

-itis f (noun-forming suffix, plural -itis)
* (pathology) -itis (denotes diseases characterized by inflammation, itself often caused by an infection)
* (humorous) -itis (forms the names of various fictitious afflictions or diseases)

#### Derived terms
### Further reading

* “-itis”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8, Royal Spanish Academy [Spanish: Real Academia Española], 2024 December 10