Similar words
regadío
regadío is more about irrigated land or farming, as opposed to dry farming "secano"; riego is more about the act of watering or irrigation itself.
Similar in other languages
French
irrigation
irrigation is the French word for the same thing — both mean "irrigation."
Portuguese
irrigação
irrigação is the Portuguese word for the same thing — both mean "irrigation."
Practice
1 What does riego mean?
irrigation
2 Fill the gap: El ___ es por goteo.
Full sentence: El riego es por goteo. (Irrigation is by drip.)
3 Which fingerprint chart matches riego?
riego: neutral register, common frequency, general domain, neutral connotation.