buildup
nounUK /ˈbɪl.dʌp/
US /ˈbɪl.dʌp/
A buildup is when something slowly grows or gathers more and more.
There was a big buildup of snow on the roof after the storm.
OTHER MEANINGS
2. Excitement and attention that comes before an important event.
The buildup to the concert lasted for weeks.
3. A gradual increase in pressure, sound, or force.
The buildup of pressure in the pipe caused it to burst.
4. A collection of something that keeps adding up over time.
Doctors warn about the buildup of plaque in arteries.