Easton's Bible Dictionary (1897)
Pure, a city on the east of Jordan (Num. 32:3); probably the same as Beth-nimrah (Josh. 13:27). It has been identified with the Nahr Nimrin, at one of the fords of Jordan, not far from Jericho.
Smith's Bible Dictionary (1863)
(limpid, pure), a place mentioned by this name in (Numbers 32:3) only. If it is the same as BETU-NIMRAH, ver. 36, it belonged to the tribe of Gad. It was ten miles north of the Dead Sea and three miles east of the Jordan, in the hill of Nimrim.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
NIM'RAH (limpid, pure), a city of Gad east of the Jordan; noticed only in Num 32:3, and probably identical with Beth-nimrah. Num 32:36. Its site may be on the hill of Nimrin, about 3 miles east of the Jordan and 10 miles north of the Dead Sea, where are some ruins.
Hitchcock's Bible Names (1869)
Nimrim, leopard; bitterness; rebellion