The ships were stuck for two weeks as the port was ice-bound.

ice-bound 是由名词 ice（冰）和形容词 bound（被束缚的）组成的复合形容词。bound 来自动词 bind（捆绑、束缚）的过去分词形式，表示"被...限制/包围"的状态。 ice-bound 字面意思是"被冰束缚的"，引申为"被冰封住的"，形容港口或水域因结冰而无法通航的状态。