Answer:
If you have me, you want to tell me. If you tell me, you don't have me.
Cold head and feetอพ Round as a ballอพ Always turning around itself.
What's that 7 letter word with thousands of letters in it?
I'm a starchy plant tuber that is one of the most important food crops, cooked and eaten fried, such as french fries.
I occur twice in eternity. And I'm always within sight.
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it, can't see it. What is it?