IPA: /ˈbælən.sɚ/
KK: /ˈbælənser/
A person or thing that keeps things steady or equal, often by adjusting or compensating for differences.
The balancer helped to ensure that the weights were evenly distributed on both sides of the scale.
Balancer → It is formed from "balance" (from Old French *balance*, meaning a scale or equilibrium) and "-er" (meaning a person who). A balancer is a person or thing that maintains balance or equilibrium.
Think of someone who helps keep things in 'equilibrium' ('balance') — the '-er' just means a person. A balancer is someone who maintains balance.