Sardonic

sär-don′ik, adj. forced, heartle , or bitter, said of a forced unmirthful laugh—( obs. ) Sardō′nian .— adv. Sardon′ically . [Fr. sard on i que —L. sard on i us , sardonic us —Gr. sardanios , referred to sard on i on , a plant of Sardinia (Gr. Sardō ), which was said to screw up the face of the eater, but more prob. from Gr. sairein , to grin.]