-sis

Origin

Ultimately from Ancient Greek -σις (-sis, "forms noun of action"), often via Latin or French.

Full definition of -sis

Suffix

1. forming nouns of action or processdialysis, noesis, prosiopesis
2. (medical) form noun of conditionpsoriasis, sepsis

Usage notes

Not very productive, primarily used for borrowed terms from Ancient Greek, also some modern coinages on Ancient Greek roots.

Derived terms