addorse
To place back-to-back, to place with the back to (something else's back).
I replied (out of a former letter from your Lordship) with some marvel why this Signory did not by their own resident in England motion the matter to the resident there of the States rather than addorse it upon his Majesty.
Where it comes from
See addorsed. Compare French adosser (and thence, Spanish adosar).
Adapted from the Wiktionary entry addorse (CC BY-SA 4.0).