How the RPG rules describe dice rolls:
this result on the dice is a critical success,
this range is a success,
that range is a failure,
this result is a critical failure.

How every RPG player feels about it:
this is a critical success,
this is nearly a critical success,
this is an excellent success,
these are very good successes,
this is a success,
that’s just a little failure,
that’s a failure,
these are failures too,
that result is a critical failure.