IPA: /ˈɪŋkrɪmənt/
KK: /ˈɪŋkrəmənt/
A small increase or addition to something, often part of a series of increases.
The company announced an increment in salaries for all employees this year.
Increment is formed from "in-" (meaning into or upon) and "crescere" (meaning to grow). The word describes the act of growing or increasing in amount or size.
Think of something 'growing' ('crescere') 'into' or 'upon' ('in-') — that's why increment means an increase.