siniestro, -a sinister, unlucky, threatening, ominous
sino but, except; ~ que but rather; without
siquiera even, at least; ni tan ~ not even
situación f. situation, plight
soberano, -a sovereign, ruling
soberano m. sovereign, ruler
sobrar be more than enough, be in excess, be left over; me sobra... I have plenty, I have more than enough
sobre over, on, about, to; ~ todo above all
sobrescrito m. address, superscription; preliminaries (of letter)
sociedad f. society