bubble up
Upper Intermediate (B2)neutral
To come up to the top slowly, like bubbles in a fizzy drink.
"Hot springs make water bubble up naturally from underground."
Hear it in context

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Typical Gamer · 36:39
Did you take bubble up?

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Joshua Weissman Recipes · 11:41
It'll start to bubble up.

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OxfordUnion · 23:45
they bubble up to the surface.

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Chunkz · 61:22
think the nerves start to bubble up

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Big Think · 20:17
going to bubble up to the surface.