How to pronounce“tumber”in English

Thomas Moore and himself were perpetually together a six tumber eight to which all the ages of the world cannot add a

protesters yesterday I had a quick chat to her Greta tumberg uh she told me it was her moral obligation to speak out uh she was joining the protest she said uh

governments who make it cheap and easy for large companies to use fossil fuels by offering them tax breaks and subsidies on excise dues Greta tumberg