Succumb means “to yield, often to a superior force.” In this instance, that force is bitterness, and King was talking about the pressure or desire to become hardened by all that has happened in the quest for equality.
The word succumb is still commonly used to describe giving in. Although, more often than not you can see it used to describe succumbing to things like illness or to lesser temptations … like reality television.
The most likely effect of the Federal Reserve lowering the discount rate on overnight<span> ... rate is the rate which banks charge one another for </span>overnight loans<span> used to .</span>