rugido, m., roar, roaring.
rugir, to roar.
ruido, m., noise, sound.
ruina, f., ruin.
ruso,-a, Russian.
rústico,-a, rustic, boorish.
S
sábado, m., Saturday.
saber,(sé, sabré, supe, sabido, pres. subj. sepa), to know, learn, be able to.
sabido,-a, well-known.