transitive. To give support to or back up (a person's conduct) or stand by (one's own actions or conduct); to support or uphold (a cause, a course…

transitive. To support or endorse (a person) in a course of action. Also reflexive: to defend oneself, be one's own advocate. Obsolete. rare.

to stand or fall: used to indicate that the success of a person or thing depends on another specified person or thing, outcome, etc. With by, on, etc.

figurative †To forward; to help or push on; to prop up; to second (obsolete). Also to take upon oneself as a burden (expense, responsibility, etc.).