Dictionary

-sis en · X

Etymology

Ultimately from Ancient Greek -σις (-sis, “forms noun of action”), often via Latin or French. Identical in meaning with Latin -entia, English -ing.

Meanings

1. (morpheme) forming nouns of action or process
   • catharsis, dialysis, diagnosis, crisis
2. (morpheme) forming nouns of condition
   • psoriasis, sepsis, tuberculosis, psychosis
3. (morpheme) forming additional nouns
   • basis, oasis, thesis, stasis

Forms