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waste
बर्बाद करना / ज़ाया करना
to use more of something than is needed or to use it in a careless way.

“Arjun realized he shouldn't waste his time scrolling on his phone when he has an exam tomorrow.”
अर्जुन को एहसास हुआ कि जब कल उसकी परीक्षा है, तो उसे फोन चलाने में अपना समय बर्बाद नहीं करना चाहिए।
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