IPA: //ˌæɡrəˈveɪʃən//
KK: /ˌæɡrəˈveɪʃən/
A situation or thing that causes ongoing annoyance or trouble, often leading to frustration.
The constant noise from the construction site became a major aggravation for the residents.
Aggravation is formed from "ag-" (meaning to or toward) and "gravare" (meaning to weigh down or burden). The word describes the act of making a situation worse or more burdensome.
Think of 'weighing down' ('gravare') something 'toward' a worse state ('ag-') — that's why aggravation means making something worse.