To progress or ride

(a)  

To carry or cause to go with haste

(a)  

One that participates in a contest

(a)  

A person or group against whom a criminal or civil action is brought

(a)  

A person who assists someone

(a)  

Lacking knowledge or comprehension of the thing specified

(a)  

The act, process, or an instance of migrating

(a)  

An established or selected course of travel or action

(a)  

A minute and often barely detectable amount or indication

(a)