Merriam-Webster Collegiate Dictionary - abut

 verb  (~ted; ~ting)  Etymology: Middle English ~ten, from Anglo-French aboter, ~er, partly from Old French aboter to border on, from a- (from Latin ad-) + bout blow, end, from boter to strike; partly from Old French ~er to come to an end, from a- + but end, aim — more at (1)butt, (4)butt  Date: 15th century  intransitive verb  1. to touch along a border or with a projecting part land ~s on the road  2.  a. to terminate at a point of contact  b. to lean for support  transitive verb  1. to border on their property ~s our land  2. to cause to ~