What is the word which has the same root as information, and has the same or similar meaning as advertisement? It is pronounced similarly to infantory. Thanks.
closed as off-topic by Tᴚoɯɐuo, Stephie, ColleenV♦, stangdon, Nathan Tuggy Jun 13 '16 at 20:03
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Are you thinking of
which is a combination of "information" and "commercial".
It is usually an extended advertisement explaining the product at length.