negatively regulates transcription elongation by RNA polymerase II negative regulation of DNA-templated transcription, elongation regulation of transcription elongation by RNA polymerase II negative regulation of transcription elongation by RNA polymerase II negative regulation of gene-specific transcription elongation from RNA polymerase II promoter Any process that stops, prevents, or reduces the frequency, rate or extent of transcription elongation, the extension of an RNA molecule after transcription initiation and promoter clearance by the addition of ribonucleotides, catalyzed by RNA polymerase II. GO:0034244 biological_process GO:0090041 negative regulation of RNA elongation from RNA polymerase II promoter negative regulation of transcription elongation from RNA polymerase II promoter biological regulation