IPA: /nɒn.dɪˈpliː.tɪŋ/
KK: /nɑn-dɪˈpliːtɪŋ/
Not causing a reduction in quantity or availability.
The renewable energy sources are considered nondepleting because they can be replenished naturally.
Nondepleting → It is formed from "non-" (meaning not) and "depleting" (from Latin "deplere", meaning to empty or drain). The word "nondepleting" means not causing something to be emptied or drained.
Think of 'not' ('non-') draining or emptying something ('depleting') — that's why nondepleting means it doesn't cause depletion.
No commonly confused words.