Speed
noun
The degree of fastness is a measurement of speed, plain and simple.
そくど
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
インターネットの速度がおそすぎてイライラしています。
The internet speeds are too slow and it’s pissing me off.
もう少し速度をおとして走行してください。
Please drive a little bit slower.
ドアを開けたら、冬の突風が物凄い速度で吹きこんできた。
When I opened the door, a wintry gust rushed in with great speed and force.