Definition of nondegradable in English:

nondegradable

Syllabification: non·de·grad·a·ble
Pronunciation: /ˌnändiˈɡrādəbəl/

Entry from US English dictionary

adjective

Not biodegradable or subject to decomposition: nondegradable waste that ends up in the water

Definition of nondegradable in:

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Word of the day oleaginous
Pronunciation: ˌəʊlɪˈadʒɪnəs
adjective
rich in, covered with, or producing oil; oily