expression, ichidan verb
quicken one's pace; speed up one's steps
Used when someone intentionally walks faster, often in response to a situation or to reach a destination sooner.
雨が降り出したので、足を速めて駅に向かった。
It started raining, so I quickened my pace toward the station.
彼は遅れそうだと気
Realizing he might be late, he sped up his steps.