the quality of being unable to express oneself clearly or effectively

स्पष्टता की कमी

English Usage: His inarticulateness during the presentation made it difficult for the audience to follow his points.

Hindi Usage: उसकी प्रस्तुति के दौरान स्पष्टता की कमी होने के कारण दर्शकों के लिए उसके बिंदुओं को समझना कठिन हो गया।