Luokka Adverbitbulgariaenglantiespanjaesperantohollantiitaliajapanikreikkalatinalatvialiettuanorjaportugalipuolaranskaruotsisaksasuomitanskaturkkitšekkiunkarivenäjäviro

sideling sidelong sidely sidesaddle sidesplittingly sideward sidewards sideway sideways sidewise sidling sidlingly siftingly sighingly sightlessly sightwise sigmoidally signally significantly siker silentiously silently silkenly silkily sillily silverily silverly silviculturally similarly simmeringly simoniacally simperingly simplemindedly simplicially

simpliciter simplistically simply simultaneously since since when sincerely sine die sinfully singing soprano singingly single file single-handed single-handedly single-mindedly singlely singlemindedly singly singularly singulatively sinisterly sinistrad sinistrally sinistrely sinistrously sinkward sinlessly sinuously sinusoidally sisterly sitewide sithence sithens

situationally six ways from Sunday six ways till Sunday six ways to Sunday sixfold sixteenfold sixteenthly sixthly sixtiethly sixtyfold sizably sizeably sizewise sizzlingly skeletally skeptically sketchily skew skiddingly skilfully skillfully skimmingly skimpily skimpingly skinnily skippingly skittishly skulkingly skyward slack slackly slam-bang slambang