key (3 letters)

What it means

1. adjective — serving as an essential component
2. verb — identify as in botany or biology, for example
3. verb — provide with a key
4. verb — vandalize a car by scratching the sides with a key
5. verb — regulate the musical pitch of
6. verb — harmonize with or adjust to
7. noun — metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated
8. noun — something crucial for explaining
9. noun — pitch of the voice
10. noun — any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music
11. noun — a kilogram of a narcotic drug
12. noun — a winged often one-seed indehiscent fruit as of the ash or elm or maple
13. noun — United States lawyer and poet who wrote a poem after witnessing the British attack on Baltimore during the War of 1812; the poem was later set to music and entitled `The Star-Spangled Banner' (1779-1843)
14. noun — a coral reef off the southern coast of Florida
15. noun — (basketball) a space (including the foul line) in front of the basket at each end of a basketball court; usually painted a different color from the rest of the court
16. noun — a list of answers to a test
17. noun — a list of words or phrases that explain symbols or abbreviations
18. noun — a generic term for any device whose possession entitles the holder to a means of access
19. noun — mechanical device used to wind another device that is driven by a spring (as a clock)
20. noun — the central building block at the top of an arch or vault
21. noun — a lever (as in a keyboard) that actuates a mechanism when depressed

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