What is the definition of Rivmnet?

Alright, let's dive into the whimsical world of 'rivmnet' – a portmanteau of 'river' and 'etronome.' Now, imagine a river that plays the most complex and relentless drumbeat you've ever heard. That's what 'rivmnet' sounds like – a melodic, relentless clatter of metal against rocks, with no rhythm to be found but the unyielding beat of an electronic heartbeat.

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Now, here's an edgy sentence for you: "The rivmnet in the abandoned subway station hummed a tune that could make the nearest ghost whisper."