Ition changes an action word into a state of being.
(suffix)An example of ition used as a suffix is changing add to addition, which means the state of adding or joining of two or more things together.
See -ition in Webster's New World College Dictionary
Origin: < Fr or L: Fr -ition < L -itio (gen. -itionis) < -i-, thematic vowel + -tio (gen. -tionis)