Meaning

noun the state of being that is commonly observed

noun the quality of lacking taste and refinement

noun ordinariness as a consequence of being frequent and commonplace

originEtymology tree English common Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English commonness From common + -ness.

Etymology from Wiktionary, CC BY-SA 3.0