encrust
/ɪnˈkrʌst; ɪn`krʌst/ v
1 [usu passive 通常用於被动语态
Tn, Tn.pr]
~ sth (with sth) cover (a surface) with a crust or thin hard coating, sometimes for decoration 在（表面）覆以薄而硬的壳或外层（有时作为装饰）
a gold vase encrusted with diamonds 镶嵌钻石的金花瓶
an encrusted wound 结痂的伤口.
2 [I] form into a crust 形成壳或硬皮
Salt from the sea had encrusted on the dry sand. 海水中的盐分在乾燥的沙子上结成硬皮.