Abut

First attested in the mid 13th century.

(of an estate) From Medieval Latin (Anglo-Latin) abuttare, from abuter ("to touch at one end, to come to an end, aim, reach"),

RHCD|page=7

from but ("end, aim, purpose"); akin to Old Norse butr ("piece of wood")

. Equivalent to -("to") + butt("boundary mark").

SOED5|page=11

from Old French aboter ("to touch at one end, border on")

MW3 1976|page=8

abouter ("to join end to end"), abuter ("to buttress, to put an end to"), from a- ("towards") + bout ("end"), boter, bouter ("to strike"),

OCD2|page=5

buter ("to strike, finish").

American Heritage 1971|page=6

Equivalent to -("towards, change to") + butt("push")

Full definition of abut

(intransitive) To touch by means of a mutual border, edge or end; to border on; to lie adjacent; to project; to terminate; to be contiguous; to meet, of an estate, country, etc. First attested around 1350 to 1470.It was a time when Germany still abutted upon Russia.His land abuts on the road.
(intransitive) To lean against on one end; to end on, of a part of a building or wall. First attested in the late 16^th century.
(transitive) To border upon; be next to; abut on; be adjacent to; to support by an abutment. First attested in the mid 19^th century.

(estate or country) Followed by any of the following words: upon, on or obsolete to.

building) Followed by any of the following words: upon, on, or against.