“Charedi is just the term people use to describe Yeshivish or Chassidim as opposed to the prejorative Ultra-Orthodox”
Maybe for some
More likely the term Charedi was originally imported by modox writers as a sleight of hand in order to segregrate traditional Yeshivish from mainstream thereby dimishing their impact.
It also then adopted by the chassidish inclined to give themselves a sort of continuity
For most of us in North America it’s the opposite probably
We may be Ultra-Orthodox
But Charedi is a black cloistered medieval prejorative