What's the adjective for prosaicisms? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs prose and prosify which may be used as adjectives within certain contexts.
“These poems are some of the most cadenced, constructed psalm variations in recent memory, and reveal limitations in prosier, less song-like examples.”
“Poor besonged, besonneted moon! whom the prosiest pen cannot scribble of without trying to invent a bit of original flattery for!”
“For then, an inclined plane of unfortunate infants would be handed over to the prosiest and worst of all the teachers with good intentions, whom nobody older would endure.”