Everywhere: all places. Anywhere: one place, but we don't know which one (or it doesn't matter which one)

First, I'll give some examples. Then, maybe in another answer, I'll quote a poem 1) I lost my eyeglasses. I looked in the kitchen. I looked in the living room. I looked in the bedroom. I looked everywhere. But I couldn't find it anywhere. I asked my wife. She said "Have you looked everywhere?" I said "Yes, I've looked everywhere." She said "keep looking. It must be somewhere." Five minutes later I said "I found them. They were in the refrigerator." 2) It was a beautiful, clear night. I looked all over the sky. There were stars everywhere. 3) I couldn't find parsnips anywhere in the supermarket.

To what the others have said, I would add that people sometimes get confused when the words are combined with "not". But it's the logic that confuses them, not the language. Condsider the sentence "It's not raining everywhere" The sentence can be interpreted two ways, depending whether "not" modifies "raining" or "everywhere". In the first case ("not raining"), it means there is no rain anywhere. In the second case ("not everywhere"), it means that somewhere there is no rain. To avoid this sort of confusion, it's best to avoid the use of "not" combined with "anywhere" or "everywhere".

Hello, Everywhere means every place , all places. Anywhere means any place. Regards

This poem by A. A. Milne is not in perfectly correct English. It is written in the language of a young child. The child loves rabbits and wants to buy a rabbit. This isn't the whole poem. To find the whole poem, do a Web search for "milne market square". "'Most" means "almost." "'Cos" means "because." "Nuffin'" means "nothing." "'Most" means "almost." I found a sixpence, A little white sixpence. I took it in my hand To the market square. I was buying my rabbit (I do like rabbits), And I looked for my rabbit 'Most everywhere. So I went to the stall where they sold fine saucepans ("Walk up, walk up, sixpence for a saucepan!"). "Could I have a rabbit, 'cos we've got two saucepans?" But they hadn't got a rabbit, not anywhere there. I had nuffin', No, I hadn't got nuffin', So I didn't go down To the market square; But I walked on the common, The old-gold common... And I saw little rabbits 'Most everywhere!