What does -sis mean?
-sis means forming nouns of action or process.
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Pronunciation varies by accent · suffix
forming nouns of action or process.
catharsis, dialysis, diagnosis, crisis
psoriasis, sepsis, tuberculosis, psychosis
basis, oasis, thesis, stasis
Use -sis when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
-sis means forming nouns of action or process.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
catharsis, dialysis, diagnosis, crisis
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