Definitions:
especially of a hill or path: steep, sloping; set at a sharp angle; high.

a section of river where the bed slopes and the water is shallow and runs swiftly; a rapid.

to officiate at a wrestling match or other contest; to act as a referee. hence more generally: to act as a mediator; to intercede or intervene. frequently with between, among. now only with reference to cornish wrestling.

with against: to fight or act in opposition to, to resist.

with for: to strive or contend for (a desired object, an issue, principle, etc.). also with up and with. now somewhat rare.

to make difficulties about something one objects to; to raise objections; to scruple; to quibble. chiefly with at, about, specifying the thing objected to.