[with obj.]cover or decorate (something) with a hard surface layer 用硬的外层覆盖(或装饰);在…表面形成硬壳 the mussels encrust navigation buoys. 航标上附满了贻贝。 [as adj. encrusted]the dried and encrusted blood. 硬结的血块。
encrustment noun 语源
early 17th cent. (in the sense 'cause to form a crust'): from French incruster or encroûter, both from Latin incrustare, from in- 'into' + crusta 'a crust'