" sobersidedness "

1: as in earnestness, soberness;

•  Synonyms : 

•  earnestness,

•  soberness,

•  graveness,

•  grimness,

•  serious-mindedness,

•  seriousness,

•  solemnity,

•  solemnness,

•  sternness,

•  priggishness,

•  starchiness,

•  stuffiness,

•  constraint,

•  restraint,

•  self-control

•  Antonyms : 

•  coltishness,

•  espièglerie,

•  friskiness,

•  impishness,

•  larkiness,

•  mischief,

•  mischievousness,

•  playfulness,

•  prankishness,

•  sportfulness,

•  sportiveness,

•  tricksiness,

•  coyness,

•  kittenishness,

•  archness,

•  devilment,

•  devilry,

•  hob,

•  rascality,

•  roguishness,

•  waggery

1: not joking or playful in mood or manner;

  * e.g., " ... a surprisingly sobersided biography of a great comedian "

•  Synonyms : 

•  earnest,

•  grave,

•  humorless,

•  no-nonsense,

•  po-faced,

•  sedate,

•  serious,

•  severe,

•  sober,

•  solemn,

•  staid,

•  uncomic,

•  unsmiling,

•  weighty

•  Antonyms : 

•  facetious,

•  flip,

•  flippant,

•  humorous,

•  jesting,

•  jocular,

•  joking,

•  kittenish,

•  ludic,

•  playful