IPA: /proʊn/
KK: /proʊn/
Having a tendency to do something or being likely to experience something; also refers to lying flat with the front facing down.
He is prone to making mistakes when he is tired.
In a position where the body is lying flat, especially face down.
The patient was lying prone on the bed.
Prone comes from Latin 'pronus' (meaning bent forward or inclined) and the suffix '-e' which is used in English to form adjectives. The word 'prone' describes a position that is inclined or lying flat, often face down.
Think of being 'bent forward' or 'inclined' — that's why 'prone' means to be in a position that is flat or face down.