IPA: /ˈproʊnli/
KK: /prəʊnli/
In a position where someone is lying flat, usually face down.
He lay pronely on the ground, trying to catch his breath after the race.
This word originates from Old English 'prone' (meaning inclined or having a tendency) and the adverbial suffix '-ly' (meaning in a manner of). Thus, 'pronely' describes an action done in an inclined or tendency-driven manner.
Think of being 'inclined' or having a 'tendency' ('prone') and doing something 'in that manner' ('-ly'). This helps you remember that 'pronely' means to act in a way that shows inclination.