This is the 438th most frequent Portuguese word.
reduzir
To reduce; to decrease; to make smaller.
In this sentence, the word "reduzir" is used to mean decreasing the amount of water waste, making an effort to lessen a value.
Precisamos reduzir o desperdício de água em casa.
We need to reduce water waste at home.
Here, "reduzir" refers to the act of lowering financial expenses within the context of purchasing.
Planejamos reduzir os custos na próxima compra.
We plan to reduce the costs in the next purchase.
The word "reduzir" in this case refers to lowering the number of working hours in a given time period.