INCONVERTIBLE

[in.con.vert.ible] adj [prob. fr. LL inconvertibilis, fr. L in- + convertibilis convertible] (1646): not convertible: as a of paper money: not exchangeable for coin b of a currency: not exchangeable for a foreign currency -- in.con.vert.ibil.i.ty n -- in.con.vert.ibly adv