From Wiktionary, the free dictionary
-ison
- Alternative form of -isoun
Latin -ātionem, accusative singular of -ātiō. Compare -acion.
-ison
- used to form feminine nouns
- French: -aison
- → Middle English: -isoun, -eison, -esoun, -esown, -ison, -isowne, -son, -soun, -yson, -ysone, -ysoun, -ysowne, -ysun
