subvert

Etymology 1

From Middle English subverten, from Old French subvertir, from Latin subvertō (“to overthrow”, literally “to underturn, turn from beneath”).

verb

1. (transitive) To overturn from the foundation; to overthrow; to ruin utterly.
   , Book IV, Chapter XVIII This would be to subvert the principles and foundations of all knowledge.
2. (transitive) To pervert, as the mind, and turn it from the truth; to corrupt; to confound.
   A dictator stays in power only as long as he manages to subvert the will of his people.
3. (transitive) To upturn convention from the foundation by undermining it (literally, to turn from beneath).

Etymology 2

Back-formation from subvertising, by analogy with advert.

noun

1. An advertisement created by subvertising.