The word "hotbed" means a place or situation where a particular activity or idea is very common or intense, usually in a negative or controversial way. Full definition
People often tell children to use their imagination when approaching a task, which comes from the understanding that imagination is a kind of hotbed of potential for learning and creativity in humans. (edutopia.org)
But his order didn't extend to state - run courthouses, which have become hotbeds for such arrests under President Donald Trump. (patch.com)
Low - and high - Earth orbits have become hotbeds of scientific and commercial activity, filled with hundreds upon hundreds of satellites from about 60 different nations. (scientificamerican.com)