am ‧ e ‧ thyst /ˈæməθəst, ˈæmɪθəst/ BrE AmE noun
[ Date: 1200-1300 ; Language: Old French ; Origin: amatiste , from Latin amethystus , from Greek , 'preventer of drunkenness, amethyst' , from methy 'wine' ]
1 . [countable] a valuable purple stone used in jewellery
2 . [uncountable] a light purple colour
—amethyst adjective