a-smoulderadv.

/əˈsməʊldə/Etymology: a prep.1 + smoulder n.
the world > matter > properties of materials > temperature > heat > burning > [adverb] > without flame
1880 A. C. Swinburne 303 So blackens a brand..asmoulder awhile from the fire.
This entry has not yet been fully updated (first published 1885; most recently modified version published online September 2018).