concentrate

noun

1
a concentrated example of something
the concentrate of contemporary despair
2
a concentrated form of a foodstuff; the bulk is reduced by removing water
3
the desired mineral that is left after impurities have been removed from mined ore

1
cook until very little liquid is left
The cook reduced the sauce by boiling it for a long time
2
be cooked until very little liquid is left
The sauce should reduce to one cup
3
make denser, stronger, or purer
concentrate juice
4
make more concise
condense the contents of a book into a summary
5
compress or concentrate
Congress condensed the three-year plan into a six-month plan
6
make central
The Russian government centralized the distribution of food
7
direct one's attention on something
Please focus on your studies and not on your hobbies
8
draw together or meet in one common center
These groups concentrate in the inner cities

Also useful for “concentrate”:Crossword— A long fill for tough grids