smolderinggerund / present participle Used as an adjective derived from the present participle of the verb "smolder".
The smoldering fire created a warm glow in the room.
Тлеющий огонь создавал теплое свечение в комнате.
Her smoldering eyes captivated everyone in the room.
Ее пылающие глаза завораживали всех в комнате.
Gerund-derived mass noun referring to the act or state of burning slowly without flame.
Gerundial noun referring to the act or process of burning slowly with smoke but no flame.