"the concentrate of contemporary despair"

"concentrate juice"

"Please focus on your studies and not on your hobbies"

"The Russian government centralized the distribution of food"

"condense the contents of a book into a summary"

"These groups concentrate in the inner cities"

"Congress condensed the three-year plan into a six-month plan"

"The sauce should reduce to one cup"

"The cook reduced the sauce by boiling it for a long time"