| sincere |
genuine, true, and not pretended. |
| sincerely |
with true and honest feelings (often used at the end of a letter). |
| sinew |
a tendon or tendons. |
| sing |
to make musical sounds with the voice. [4 definitions] |
| sing a different tune |
to change one's opinion or behavior. |
| Singapore |
a country in southeastern Asia. [2 definitions] |
| singer |
a person who sings as a job or hobby. [2 definitions] |
| single |
only one. [8 definitions] |
| single-handed |
done without help. [2 definitions] |
| single-minded |
focused on a single goal or purpose. |
| singular |
having to do with or designating the form of a word that indicates only one. [2 definitions] |
| sinister |
threatening or suggesting evil, injury, or danger; ominous. |
| sink |
to fall or drop slowly to another level. [8 definitions] |
| sinker |
a small weight used to lower a fishing line or net under water. |
| sinuous |
having many curves or turns. |
| sinus |
any of the hollow places in the skull that connect with the nose. |
| Sioux |
a member of a group of Native American peoples who are from the plains of the northern United States and southern Canada. |
| sip |
to drink slowly and a little at a time. [3 definitions] |
| siphon |
a tube or pipe used to suck a liquid over the top of its container and into a lower one by means of air pressure. [2 definitions] |
| sir |
(often capitalized) a form of address for a man, usually used in place of his name. [2 definitions] |
| siren |
a warning device that makes a loud, piercing noise. |