Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

-osis Also -sis.

Abstract nouns of action, state, or process.

[Greek -ōsis or -sis, verbal noun endings.]

In classical Greek, the ending formed abstract nouns from verbs, of which a number have been brought over into English, such as metamorphosis (Greek metamorphōsis, from metamorphoun, transform, change shape), a change into a completely different form or nature; narcosis (Greek narkōsis, from narkoun, make numb), a state of stupor or unconsciousness produced by drugs; and gnosis (Greek gnōsis, knowledge, related to gignōskein, know), knowledge of spiritual mysteries.

English words ending in -osis are commonly names for diseases, diseased conditions, or pathological states: neurosis; tuberculosis; thrombosis; nephrosis (Greek nephros, kidney), kidney disease; silicosis, a disease of the lung caused by inhaling dust containing silica.

Adjectives are commonly formed in -otic. See also -asis, -cyte (for -cytosis), -esis, and -lysis.

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