1. im- "into, in, on, upon" + post- + -ure.
2. 字面含义:put upon, place upon, a laying on.
3. => sb put himself upon the position which belongs to another.
4. 也就是说某人将他自己放置在本来属于别人的位置上。
5. put something bad like deception on sb.
6. 或者说:以次充好,以假乱真,以假代真。=> 欺骗、欺诈。
7. put false on true, put false replace true.