serpens, -entis [part, of serpo, _crawl_], f., _serpent_.
servio, -ire, -ivi, -itus [servus], _be subject to, serve_.
servitus, -tutis [servus], f., _slavery, servitude_.
servo, -are, -avi, -atus, _save, preserve_.
servus, -i, m., _slave, servant_.
si, conj., _if_.
sic, adv., _so, thus_.
Sicilia, -ae, f., _Sicily_.
signum, -i, n., _sign, signal_.
silva, -ae, f., _wood, forest_.
simul, adv., _at the same time_; simul atque or ac, _as soon as_.
sine, prep. with abl., _without_.
sinister, -tra, -trum, _left_.
sinistra, -ae [sinister], f., _left hand_ (manus understood).
sinus, -us, m., _bosom, lap_.
situs, -a, -um [part. of sino], _placed, situated_.
si-ve or seu, conj., _or if_; sive ... sive, _whether ... or_.
socius, -i [sequor], m., _companion, comrade, ally_.
sol, solis, m., _sun_.
solium, -i [sedeo], n., _seat, throne_.
sollicitudo, -tudinis [sollicitus], f., _anxiety, care, apprehension_.
sollicitus, -a, -um, _troubled, anxious_.
solus, -a, -um, _alone_.
solvo, solvere, solvi, solutus, _loosen, unbind, release; pay_; with or
without navem, _cast off, set sail, put to sea_.
somnus, -i, m., _sleep, drowsiness_.
sonitus, -us [sono, _sound_], m. _sound, noise_.
sonorus, -a, -um [sono, _sound_], _sounding, loud, noisy_.
soror, -oris, f., _sister_.
sors, sortis, f., _lot_.