IPA: /ˈhɪndərər/
KK: /ˈhɪndərər/
A person or thing that makes it difficult for someone or something to progress or succeed.
The new regulations acted as a hinderer to the company's growth.
Hinderer → It is formed from "hinder" (from Old English "hindrian", meaning to obstruct or impede) and "-er" (meaning a person who). A hinderer is a person who obstructs or impedes progress.
Think of someone who 'obstructs' ('hinder') others — the '-er' just means a person. A hinderer is someone who gets in the way.