The express package was miscarried and never reached the recipient.

was miscarried 是动词 miscarry 的被动语态过去式。miscarry 由前缀 mis-（表示“错误”）和 carry（运送）组成，字面意思是“错误运送”，引申为“误送、丢失”。was miscarried 表示“被误送/被丢失”。