abut (v.) Look up abut at Dictionary.com
mid-13c., "to end at, to border on, touch at the end," from Old French aboter, abuter "join end to end, touch with an end" (13c.), and abouter "join end to end," from à "to" (see ad-) + boter, bouter "to strike, push," from a Germanic source, from Proto-Germanic buttan, from PIE root *bhau- "to strike." Compare butt (v.). Related: Abutted; abutting.