Referring to something that does not meet the usual standard of quality.

Communication that is below the accepted standards in clarity or coherence.

अस्वीकृत भाषण

English Usage: The teacher addressed the problem of sub-standard speech in the classroom.

Hindi Usage: शिक्षक ने कक्षा में अस्वीकृत भाषण की समस्या का उल्लेख किया।