fusio

See also: fusió

Latin

Etymology

Formed by suffixation of fundō (“I pour out”, perfect stem: fūd-) +‎ -tiō, where the concatenation of the two dentals (d- + -t) forms a sibilant (s).

Pronunciation

(Classical) IPA^(key): /ˈfuː.si.oː/, [ˈfuːs̠ioː]

(Ecclesiastical) IPA^(key): /ˈfu.si.o/, [ˈfuːs̬io]

Noun

fūsiō f (genitive fūsiōnis); third declension

a pouring out; an outpouring, effusion
a melting, founding, casting
a duty

Declension

Third-declension noun.

Case	Singular	Plural
Nominative	fūsiō	fūsiōnēs
Genitive	fūsiōnis	fūsiōnum
Dative	fūsiōnī	fūsiōnibus
Accusative	fūsiōnem	fūsiōnēs
Ablative	fūsiōne	fūsiōnibus
Vocative	fūsiō	fūsiōnēs

Descendants

Inherited:
- Old French: foison
  - Middle French: foison
    - French: foison
  - → Middle English: foisoun
    - English: foison
- Old Occitan: foizon
- Piedmontese: foson
Borrowed:
- → Catalan: fusió
- → English: fusion
- → French: fusion
- → Italian: fusione
- → Occitan: fusion
- → Piedmontese: fusion
- → Portuguese: fusão
- → Romanian: fuziune
- → Spanish: fusión

References

“fūsiō” on page 751/1 of the Oxford Latin Dictionary (1st ed., 1968–82)
Walther von Wartburg (1928–2002), “fūsio”, in Französisches Etymologisches Wörterbuch (in German), volume 3: D–F, page 913