tach up

1. Of a motor, to increase very quickly or suddenly in rotational speed; to rev up. ("Tach," pronounced "tack," is a shortening of "tachometer," an instrument used to measure rotations per minute.) Every night, at exactly 2 AM, I hear the sound of motorcycles taching up outside my house. The motor started making an awful grinding noise as it tached up to 6200 RPMs.

2. To increase the revolutions per minute of a motor, especially very quickly or suddenly. In this usage, a noun or pronoun can be used between "tach" and "up." The driver beside me started taching up his engine while we waited for the light to turn green, egging me on to engage with him in a road race. Don't tach the motor up like that—it's really disturbing for everyone who lives in this neighborhood.

词组	tach up
释义	tach up tach up 1. Of a motor, to increase very quickly or suddenly in rotational speed; to rev up. ("Tach," pronounced "tack," is a shortening of "tachometer," an instrument used to measure rotations per minute.) Every night, at exactly 2 AM, I hear the sound of motorcycles taching up outside my house. The motor started making an awful grinding noise as it tached up to 6200 RPMs. 2. To increase the revolutions per minute of a motor, especially very quickly or suddenly. In this usage, a noun or pronoun can be used between "tach" and "up." The driver beside me started taching up his engine while we waited for the light to turn green, egging me on to engage with him in a road race. Don't tach the motor up like that—it's really disturbing for everyone who lives in this neighborhood. See also: up Farlex Dictionary of Idioms. See also: rev rev something up rev up revved revved up take on (a) new significance burst out of (somewhere or something) take on (a) new meaning a light bulb goes on in (one's) brain a light bulb goes on in (one's) head
随便看	waste on waste (one's) breath waste one's breath waste one's breath, to waste on (someone or something) waste (someone) waste time waste your breath wastin wasting watch watch! watched pot never boils watched pot never boils, a watcher watch for watch for (someone or something) watching paint dry Watch it! watch it watch like a hawk watch my dust watch my lips Watch my lips! watch (oneself)