Unending Appetite

Riddle: I eat all things before me, my appetite unceasing. But if I take the smallest drink I'll surely die. What am I?

Answer:

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Source: https://www.riddles.com/6054

I eat all things before me, my appetite unceasing. But if I take the smallest drink I'll surely die. What am I? — Unending Appetite by L Kitch v1.

Riddle: I eat all things before me, my appetite unceasing. But if I take the smallest drink I'll surely die. What am I? Answer: Fire. — by L Kitch v2.