-tion

• -ion (as in complexion)
• -sion
• ⠰⠝

From Middle English -cioun, borrowing from Old French -tion, -cion, borrowed from the stem of Latin -tiō. The Middle English -cioun became -tion in Modern English under the influence of the Middle French -tion and original Latin spellings.

• IPA^(key): /-ʃən/

-tion

1. (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, starvation) are not derived from Latin and are unrelated to any verb.

   (Can we add an example for this sense?)

• -ion
• -ation
• -isation/-ization

• -al
• -ing
• -ure

• INTO, Toni, into, noit, oint, on it

• IPA^(key): [-ˈɕoˀːn]

-tion

1. -tion; making nouns.

• -ation

Borrowed as a learned form from Latin suffix Latin -tiōne or -tiōnem, ending of the singular ablative or accusative of those nouns ending with -tiō (part of the Latin third declension). The original inherited form of the suffix, -on/-son (or -aison from -ātionem), is today less common but can be found in words such as raison, saison, chanson, venaison, oraison, garnison, etc.

• IPA^(key): /sjɔ̃/
• IPA^(key): /tjɔ̃/ (if previous letter is "s", as in "digestion", "question", "combustion", etc.)
• Rhymes: -ɔ̃

-tion

1. Used to indicate action, condition, result or effect, similar to the English suffix.

• -ation (different (surface) analysis)

• IPA^(key): /-ˈtsi̯oːn/, [-ˈt͡sjoːn], [-t͡siˈoːn]
• The pronunciation with a syllabic [i] is virtually obsolete, thus one may simply transcribe /-ˈtsjoːn/.

-tion f (genitive -tion, plural -tionen)

1. -tion

• Aktion

• -ion
• Kommunikation

• -tion in Duden online, -tion in Duden online, -tion in Duden online (doesn't have -ion, -ition)
• “-ation” in Digitales Wörterbuch der deutschen Sprache (doesn't have -tion, -ion, -ition)
• canoo.net: Noun derivation: Foreign suffixes (does have -ation, -ition and doesn't have -ion, -tion)

• IPA^(key): /-ˈɧuːn/

-tion

1. -tion; making nouns. See also -else, -ing and -ning.