速度（そくど、sokudo）
- speed

The Japanese word 速度 (速度, そくど, sokudo) means "speed" or "velocity." It refers to how fast something is moving or the rate at which something changes position over time. It can apply to various things, from the speed of a car to the rate of growth.

⚫︎車の速度 Translation: The speed of the car. ⚫︎インターネットの速度が遅い Translation: The internet speed is slow. ⚫︎この電車の最高速度は時速300キロです Translation: The maximum speed of this train is 300 kilometers per hour.

⚫︎ You can use 速度 in various contexts where you want to talk about how fast something is. ⚫︎It is commonly used when discussing cars, trains, airplanes, the internet, and other moving objects or processes. ⚫︎You can combine 速度 with adjectives or adverbs to describe the speed, such as 速い（はやい） (fast), 遅い（おそい） (slow), 高い（たかい） (high), or 低い（ひくい） (low). ⚫︎You can also add particles to specify the subject or context. For example, の (no) to indicate possession or a descriptive element, as in the first example above.

⚫︎ 速度 is written in kanji as 速度. ⚫︎ The reading, そくど (sokudo), is written in hiragana. ⚫︎ 速度 does not have any common variations in okurigana. ⚫︎ It is also very occasionally written in katakana as ソクド, but this is less common.

⚫︎ スピード (supiido): This is a loanword from English "speed" and is commonly used. It is often considered more casual. ⚫︎ 速さ（はやさ） (hayasa): This means "speed" or "rapidity" and emphasizes the quality of being fast.

⚫︎ 遅さ（おそさ） (ososa): This means "slowness" or "lateness." ⚫︎ 低速度（ていそくど） (teisokudo): This means "low speed."

この道路の制限速度は時速60キロです。 ・Translation: The speed limit on this road is 60 kilometers per hour. ・Explanation: This sentence uses 速度 to describe the speed limit of a road.

彼は速度を上げて、レースに勝ちました。 ・Translation: He increased his speed and won the race. ・Explanation: This sentence illustrates using 速度 in the context of increasing or decreasing speed.

The word 速度 is a compound word in Japanese, formed from two kanji: 速 (soku), meaning "fast," and 度 (do), meaning "degree" or "rate." Together, they create the concept of the rate or degree of speed.