impostor

n person pretending to be sb else, usu in order to deceive others 冒名顶替的人（通常为行骗）.

import duty, importance, important, important-looking, importantly, importation, importer, importunate, importunately, importune, importunity, impose, impose...on, imposing, imposingly, imposition, impossibility, impossible, impossibly, impost, imposture, impotence, impotent, impotently, impound, impoverish, impoverished, impoverishment, impracticability, impracticable, impracticably, impractical, impracticality, impractically, imprecation, imprecise, imprecisely, imprecision, impregnability, impregnable,