IPA: /ˈweɪər/
KK: /ˈweɪər/
A person or device that measures the weight of something.
The weigher at the market helped me determine how much my fruits weighed.
Weigher → It is formed from "weigh" (from Old English "wegan", meaning to carry or to weigh) and "-er" (meaning a person who). A weigher is a person who weighs something.
Think of someone who 'carries' ('wegan') the responsibility of determining weight — that's what a weigher does.