from Wiktionary, Creative Commons Attribution/Share-Alike License.
- suffix non-productive Used to form nouns meaning "the action of (a verb)" or "the result of (a verb)". Words ending in this suffix are almost always derived from a similar Latin word; a few (eg
gumption) are not derived from Latin and are unrelated to any verb.
from Wiktionary, Creative Commons Attribution/Share-Alike License
From Middle English -cion, Old French -tion, -cion, borrowed from the accusative of Latin suffix -tiō. The Middle English -cion became -tion under the influence of the Middle French -tion and original Latin spellings.