Answer: tacho

AnswerCrossword Clue
TACHO

Speed (prefix)

TACHO

Speed: Pref.

TACHO

Prefix with meter

TACHO
Speed: Comb. form
TACHO
Type of meter
TACHOSpeed: Prefix
TACHOPrefix with -meter
TACHOStart for "meter"
TACHOPrefix meaning "speed"