endorse

Origin: Alteration influenced by of , from , from , alternative form of back, from which also of the back. That is, the ‘r’ was dropped in , which developed into Old French and then , and then the ‘r’ was re-introduced into English via the , which had retained the ‘r’. Note that the alternative spelling indorse also uses the initial ‘i’ from Latin (in-, rather than en-), but this form is now rare. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).