12-Letter Words Containing: I,R,I,O,P,E,_,_

• pose a threat to; present a danger to

• put at risk

• cause (a compound) to polymerize

• undergo polymerization

• a B vitamin that is essential for metabolism of amino acids and starch

• resembling hieroglyphic writing

• written in or belonging to a writing system using pictorial symbols

• writing that resembles hieroglyphics (usually by being illegible)

• a writing system using picture symbols; used in ancient Egypt

• an immunosuppressive drug (trade name Imuran) used to prevent rejection of a transplanted organ

• simplify to an excessive degree