Englishfor English speakers
root
Noun
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A root is a part of a tree or plant that is under the ground.
The tree was supported by strong roots.
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A root is the important part or the beginning part of something.
I've lived here so long that I have roots here.
The root of the word "being" is "be".
root
Verb
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To root is to give or enable to something to develop roots; to fix or implant by or as if by roots
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To root is to remove altogether by or as if by pulling out by the roots - usually used with out
The school authorities will root out the troublemakers.
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To root is to grow roots or take root.
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To root is to have an origin or base.
The love of money has its roots in greed.
index
Noun
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An index is an alphabetical (A to Z) list, usually at the back of a book, where you can find the pages in a book that talk about particular things or words.
Look in the index to see where they talk about Chomsky.
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An index shows the level of prices, wages, etc. so you can compare them with those of an earlier date.
On Wall Street, the Dow Jones index closed 10 points up at 2,731.23.
index
Verb
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If you index something, you make an index (guide) for it.
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If you index something to a certain price level, you make it go up or down with that level.