Englishfor English speakers
spoil
Verb
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If something spoils it becomes no good. This is often due to rotting.
If found my lunch was spoiled.
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If you spoil something, you ruin it, you make it no good.
I think I spoiled my presentation by forgetting my data.
dam
Noun
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A dam is like a wall used to hold back water. Usually, this is to block a river.
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A dam is a barrier like that used to hold back water, such as a dental dam.
dam
Verb
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If you dam a river you block it with a dam.