region in northwestern Asia, the name said to come from Sibir, ancient Tatar fortress at the confluence of the Tobol and Irtysh rivers. As a typical place of miserable banishment, it is attested from 1841. Related: Siberian.
si
sialo-
Siam
Siamese
sib
Siberia
sibilant
sibilate
sibling
sibyl
sibylline