upshift

/AH1 P SH IH0 F T/
noun
  1. 1

    A shift to a higher gear

  2. 2

    A shift to a higher level, such as of frequency, growth, economic level, etc.

verb
  1. 1

    To shift to a higher gear

    โ€œYou can upshift to second gear once the car is moving.โ€

  2. 2

    To shift to a higher level, such as of frequency, growth rate, economic level, etc.

    โ€œThe frequency of the light is upshifted.โ€

Antonyms

Source: https://en.wiktionary.org/wiki/upshift