Sicily (the largest island in the Mediterranean Sea, an autonomous region of Italy, close to Africa and separated from Tunisia and Libya by the Strait of Sicily)

Sydney (the capital city of New South Wales, Australia, and largest city in Australia)

Sierra Leone (a country in West Africa)

Singapore (an island and city-state in Southeast Asia, located off the southernmost tip of the Malay Peninsula; a former British crown colony and state of Malaysia (1963-1965))

alternative letter-case form of sinjoro (“sir, mister”)

Sirio

Syria (a country in West Asia in the Middle East)

himself, herself, itself, themselves, oneself

sia

belonging to the subject of the sentence

siama ĝemelo

/siˈama d͡ʒeˈmelo/

in time, at the time, at the right time

in its own turn, likewise

sibla

sibilant, shrill; characterized by a hissing sound.

sibli

to hiss, sibilate (especially of animals)

to sit, be sitting

seat, headquarters
toilet seat

sidi

buttock, buttcheek

/sidˈt͡ʃambro/

sieraleonano

/sieraleoˈnano/

a Sierra Leonean

to besiege, lay siege to

A syphilitic, someone with syphilis.

seal (pattern, design)

/siɡelˈvakso/

sigmo

signal used in communication

signage (signs collectively)

to signify, mean

meaning
significance

signifoplena

/siɡnifoˈplena/

meaningful (having meaning, significant)

signo

character, mark
sign, signal

sika

siko

/silenˈtid͡ʒi/

to become silent

silfo

silicia acido

/siliˈt͡sia aˈt͡sido/

flint
silica

silka

silko

/silˈkrau̯po/

silhouette (dark shape and outline of something visible against a lighter background)

simarubacoj

/simaruˈbat͡soi̯/

Collectively, all plants of the family Simaroubaceae.

/simboˈlet͡so/

to symbolize (US), symbolise (UK)

symbol, placeholder

symmetric, symmetrical

simia

simii

to ape (to imitate)

/simiˈlet͡so/

similarness, similarity

to be alike
to resemble

simio

monkey, ape (primate)
simian (Haplorhini)

kindness
sympathy

ingenuous, guileless, artless, simple

/simˈplet͡so/

simpleness, simplicity (the property of being simple)

sinaltrudado

/sinaltruˈdado/

imposing on one another

self-love, self-regard, vanity, narcissism

/sint͡seˈret͡so/

personal constraint; self-imposed constraint
self-discipline

A syndicate, a group cooperating for a common purpose
a syndicate, labor union

selfless, generous, devoted

devotedly, generously, selflessly

alternative form of sin doni (“to devote oneself”)

careful, cautious

carefully, cautiously

sinister (evil)

lady (generic polite term for a woman, or specific title of nobility)
madam, miss (generic title or term of address)
mistress

/sinjoˈrit͡ʃo/

gentleman (generic polite term for a man)
lord
master
sir, mister (generic title or term of address)

sinkretismo

/sinkreˈtismo/

synchronic, synchronous

/sinkroˈniɡi/

to synchronise/synchronize

sinmasturbado

/sinmasturˈbado/

self-masturbation

/sinmorˈtiɡi/

to commit suicide, to take one's own life

/sinmorˈtiɡo/

suicide (act of killing oneself)

sinnekonado

/sinnekoˈnado/

mutual ignorance, not knowing (of) one another

sino

lap (upper legs of a seated person)

sinokomputilo

/sinokompuˈtilo/

synonym (word that shares a meaning with another word)

consecutive, successive

sintezatoro

/sintezaˈtoro/

dated form of sintezilo (“synthesizer”)

sinto

sine
sinus

sea cow
siren (loud sound on an alarm)
siren (seductive woman)
siren, mermaid

siria

siro

to systematize (US), systematise (UK)

bucket (container)

/situaˈt͡sio/

One's status with regard to circumstances.
location
situation, state of affairs

situi

situo

sievert (derived unit of radiation dose)