mailer

n (US) (usu small) container or envelope in which sth is sent by post （通常为小的）邮寄物品的容器或封套.

mahout, maid, maid of honour, maid-servant, maiden, maiden aunt, maiden name, maiden speech, maiden voyage, maidenhair, maidenhead, maidenhood, maidenly, maidservant, mail, mail order, mail-bag, mail-order, mailbox, mailed, mailing list, mailman, mailshot, maim, main, main clause, main deck, main drag, main line, mainbrace, mainframe, mainland, mainline, mainly, mainmast, mainsail, mainspring, mainstay, mainstream, maintain,