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so they dont have to say anything.

And because they need time to think of something to say so they use umm.

Umm also means they are making more than one point, for example.

Global warming has many dangers such as, the heat, the dryness umm, the fuel and gas umm and the water.

I recommend not using the word umm in a speech because you won't be very professional.

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14y ago

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