-ison

== Middle English == === Suffix === -ison alternative form of -isoun == Old French == === Alternative forms === -eison, -oison === Etymology === From Latin -ātiō. Doublet of -acion. === Suffix === -ison used to form feminine nouns ==== Descendants ==== French: -aison → Middle English: -isoun, -eison, -esoun, -esown, -ison, -isowne, -son, -soun, -yson, -ysone, -ysoun, -ysowne, -ysun