to suffer or experience prolonged hardship or distress

to become weak or feeble

कमजोर या निर्बल होना

English Usage: He feared that his health would languish if he didn't start exercising regularly.

Hindi Usage: उसे डर था कि अगर उसने नियमित रूप से व्यायाम नहीं किया तो उसकी सेहत कमजोर हो जाएगी।