to sleep
From Proto-Italic *dormjō, from Proto-Indo-European *dr̥m-yé-ti, from Proto-Indo-European *drem- (“to run, sleep”). Cognates include Old Church Slavonic дрѣмати (drěmati, “to drowse, doze”), Russian дрема́ть (dremátʹ), Sanskrit द्राति (drāti, “to sleep”), Ancient Greek δαρθάνω (darthánō, “to sleep”).
Practice speaking and memorizing "dormio" and many other words and sentences in Latin.