sostengo, pres. of sostener.
soy, pres. of ser.
su, his, her, its, your, their.
suave, mild, gentle.
suavemente, gently, mildly.
suavidad, f., suavity, gentleness.
subida, f., rise, advance in price.
subir, to ascend, go upstairs, mount, rise.
súbitamente, suddenly.
súbit-o, -a, sudden.