Strong's #5515: Ciyniym (pronounced see-neem')
plural of an otherwise unknown name; Sinim, a distant Oriental region:--Sinim.
Brown-Driver-Briggs Hebrew Lexicon:
sı̂ynı̂ym
Sinim = "thorns"
1) a people living at the extremity of the known world; may be identified with the inhabitants of southern China
Part of Speech: adjective proper plural
Relation: of an otherwise unknown name
Usage:
This word is used 1 times:
Isaiah 49:12: "from the north and from the west; and these from the land of Sinim."