IPA: /ˈniːlər/
KK: /ˈniːlər/
A person who kneels, often for prayer, or an object like a cushion or board that provides support for kneeling.
The church provided a kneeler for the congregation to use during prayer.
Kneeler → It is formed from "knee" (from Old English "cneow", meaning the joint between the thigh and the lower leg) and "-er" (meaning a person who). A kneeler is a person who kneels, typically in prayer or reverence.
Think of someone using their 'knee' to kneel down — that's why a kneeler is a person who kneels.