[‹ NL ‹ Gk kýēsis pregnancy, equiv. to kyē- (var. s. of kyeîn to be pregnant) + -sis-sis]-sis is a suffix appearing in loanwords from Greek, where it was used to form from verbsabstract nouns of action, process, state, condition, etc. Other words that use theaffix -sis include: anamnesis, dieresis, ellipsis, symbiosis, thesis