速度
そくど · sokudo · JLPT N3 · noun
speed
🏎️ 速度 = fast (速) + degree (度): the degree of fastness
速 (soku) means fast, as in 高速 (kōsoku, high-speed). 度 (do) means degree or measure, as in 温度 (ondo, temperature). So 速度 is literally a measure of fastness: speed or rate.
度 — 广 (shelter) + 庶 abbreviated (phonetic)
Originally depicted a hand measuring length under a shelter, meaning 'to measure' or 'a measure/standard.' From this came extended senses like 'degree,' 'extent,' and 'to pass through' (as in passing time). The reading 'dù' means degree/measure, while 'duó' preserves the older verbal sense of measuring.