indorse

Etymology
Alteration influenced by of, from , from , alternative form of , from which also. That is, the ‘r’ was dropped in Latin dossum, which developed into Old French and then Middle English endosse, and then the ‘r’ was re-introduced into English via the Medieval Latin indorsare, which had retained the ‘r’; at the same time the ‘e’ (French) was changed to ‘i’ (Latin) (, rather than ). Note that the alternative form is now more common, retaining the restored ‘r’ but reverting to the initial ‘e’, rather than the Latinate ‘i’.