"smoldering" in the verb sense
1. smolder, smoulder
burn slowly and without a flame
"a smoldering fire"
2. smolder, smoulder
have strong suppressed feelings
"smoldering" in the adjective sense
1. smoldering, smouldering
showing scarcely suppressed anger
"her tone was...conversational although...her eyes were smoldering"- James Hensel
Source: WordNet® (An amazing lexical database of English)
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