Vain (adjective) means 1. having or showing an excessively (too much) high opinion of one's appearance, abilities or worth. Example: He's so vain, he's always looking in the mirror. 2. useless. Example: He tried in vain to lift the box.

Intended means 1. (Adjective) planned or meant. Example: She intended to get the 6 o' clock train but she missed it. 2. (Informal Noun) the person one plans to marry, fiancé/ fiancée Example: She was my intended but she broke off the engagement.