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Austere (adjective):
English Meaning - Very simple, with only the things that are absolutely necessary, especially because of severe limits on money or goods.
Bangla Meaning - অনাড়ম্বর; নিরাভরণ; কঠোর; বিশুষ্ক।

Other forms:
Ascetic (noun) তপস্বী; তাপস; সন্ন্যাসী; কৃচ্ছ্রব্রতী।
Ascetically [আসেটিক্‌লি] (adverb) কঠোরভাবে; তপস্বীর মতো।
Asceticism [আসেটিসিজাম্‌] (noun) কৃচ্ছ্রব্রত; কঠোর তপশ্চর্যা; বৈরাগ্য; সন্ন্যাস।

Other options,
Hedonistic - Living and behaving in ways that mean you have as much pleasure as possible, according to the belief that the most important thing in life is to enjoy yourself.
Epicurean - Getting pleasure from food and drink of high quality.
Materialistic - Believing that having money and possessions is the most important thing in life.

Source:
1. Cambridge Dictionary.
2. Accessible Dictionary by Bangla Academy.