speed up   (TTS Sound)

The speed_up has 2 Senses.

• quicken, speed up, speed, accelerate
• スピードアップ, 加速, 速まる
• move faster; "The car accelerated"
• より速く動く

• speed up, speed, accelerate
• cause to move faster; "He accelerated the car"
• より速く動く原因