This is the 16069th most frequent Russian word.
разбавить
"Разбавить" means "to dilute" or "to thin."
Here, 'разбавить' is used to indicate mixing a liquid with another substance to decrease its concentration.
Я решил разбавить сок водой, чтобы он был менее концентрированным.
I decided to dilute the juice with water to make it less concentrated.
In this sentence, 'разбавлены' (passive voice) metaphorically signifies dilution of ideas or beliefs by external factors.
Его понятия о жизни кажутся разбавлены влиянием современных тенденций.
His notions about life seem diluted by the influence of modern trends.
Here, 'разбавить' metaphorically implies enhancing or altering a flavor by adding substances.