That has increased; heightened

simple past tense and past participle of step up

(transitive, idiomatic) To increase, augment, or advance, especially by one or more steps.

(intransitive, idiomatic) To assume or take responsibility.

That increases in stages. / (of a transformer etc) That increases a voltage.

(exercise) A workout movement wherein one leg stands on an elevated surface and lifts in the concentric part the rest of the body up onto it to target – depending on angle and starting distance of the other leg and weights applied by the arms – the femoral and gluteal muscles variously.

Third-person singular simple present indicative form of step up

present participle of step up

(chiefly US, idiomatic) To initiate action; to assume or take a responsibility.

(idiomatic, colloquial) To improve one's performance, or the quality of one's work.