Old French asseurer

← Old French a (confix)

← Old French seur (confix)

← Old French er (confix)

← Latin ad- (derived)

← Latin sēcūrus (mention)

→ English assure (derived)

→ English assurance (mention)

→ French assurer (inherited)

→ Middle French asseurer (inherited)

→ Middle French asceurer (derived)

→ Old French asseurance (suffix)

→ Old French rasseurer (prefix)