biàn​sù

change speed

变速 (變速) biàn​sù
change speed verb
to change speed or to shift gears in a vehicle or machine

The athlete suddenly accelerated in the final stretch and sprinted toward the finish line.

variable-speed verb
capable of operating at different speeds; multi-speed

This variable-speed drill can be adjusted for different materials.

Frequency

Movie subtitles
0.240 per million appears in 0% of films
Written text
3.33 per million

Sources

Definitions
CC-CEDICT