(transitive) To overpower; to overcome; to extinguish; — said especially of sound; usually in the form "to drown out".
(transitive) To lose, make hard to find or unnoticeable in an abundant mass.
Esimerkit
most men being in sensual pleasures drowned
My private voice is drowned amid the senate.
The CIA gathers so much information that the actual answers it should seek are often drowned in the incessant flood of reports, recordings, satellite images etc.