1. (Abstract Noun) the quality of being costy. অধিক খৰচ

English: costliness,
Assamese: ব্যয়বহুলতা, ব্যয়বাহুল্য

Different POS:

a. Proper Adj.: costly, expensive, overpriced, precious, sumptuous...
b. Abstract Noun: charge, cost, price, value, worth...