percolation

noun
1
the process of a liquid, gas, etc. moving gradually through a surface that has very small holes or spaces in it
تراوش, نفوذ
2
the process of becoming known or spread through a group or society
نفوذ, رسوخ, گسترش, سرایت, انتشار
Eco-tourism will help percolation of money to the local level and help the community.
3
the process of making coffee in a percolator
دم‌کردن, دم‌آوری