sueño
/ˈsweɲo/ · A1 · noun · m
sleep
🛏️ From Latin somnus (sleep) — same root as insomnia and somnolent
Latin somnus and somnium (dream) both became sueño, so it means sleep and dream alike. The mn turned into ñ, as in otoño from autumnus. Tener sueño = to have sleep, i.e. to be sleepy.