Anagrams of: BIRU

• an unforeseen obstacle

• the act of rubbing or wiping

• move over something with pressure

• cause friction

• scrape or rub as if to relieve itching

• support resembling the rib of an animal

• any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)

• cut of meat including one or more ribs

• a teasing remark

• a riblike supporting or strengthening part of an animal or plant

• a projecting molding on the underside of a vault or ceiling; may be ornamental or structural

• form vertical ribs by knitting

• subject to laughter or ridicule

• seed vessel having hooks or prickles

• small bit used in dentistry or surgery

• remove the burrs from

• a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals