To burn slowly and without a flame.

To show or feel barely suppressed anger or another strong emotion.

दबा हुआ ग़ुस्सा महसूस करना

English Usage: He smouldered with anger as he heard the unfair accusations.

Hindi Usage: जब उसने अन्यायपूर्ण आरोप सुने, तो वह ग़ुस्से में जल उठा।

A state of burning slowly without flame.

धुआँ

English Usage: The smouldering remains of the fire were a sign of the night's intensity.

Hindi Usage: आग की धुंआती हुई चिता रात की तीव्रता की निशानी थी।