" unsentimental "

1: based on, influenced by, or resulting from reason or thought rather than feelings or emotions;

  * e.g., " ... an unsentimental decision "

•  Synonyms : 

•  aloof,

•  bloodless,

•  detached,

•  indifferent,

•  insensible,

•  unconcerned,

•  affectless,

•  apathetic,

•  cold-blooded,

•  emotionless,

•  impassible,

•  impassive,

•  numb,

•  passionless,

•  phlegmatic,

•  stoic,

•  stolid,

•  undemonstrative,

•  unemotional,

•  cold,

•  cool,

•  dispassionate,

•  unmoved,

•  calm,

•  collected,

•  composed,

•  imperturbable,

•  unflappable,

•  reserved,

•  reticent,

•  taciturn,

•  bland,

•  blank,

•  deadpan,

•  dry,

•  empty,

•  expressionless,

•  inexpressive,

•  stone-faced,

•  straight-faced,

•  vacant,

•  wooden,

•  enigmatic,

•  impenetrable,

•  inscrutable,

•  impersonal,

•  objective,

•  unresponsive,

•  hard-hearted,

•  pitiless,

•  unfeeling,

•  inconsiderate,

•  thoughtless

•  Antonyms : 

•  gushing,

•  maudlin,

•  mawkish,

•  mushy,

•  sentimental,

•  blazing,

•  burning,

•  fiery,

•  flaming,

•  glowing,

•  red-hot,

•  ardent,

•  enthusiastic,

•  gung ho,

•  warm-blooded,

•  zealous,

•  dramatic,

•  histrionic,

•  melodramatic,

•  overemotional,

•  overheated,

•  perfervid,

•  compassionate,

•  responsive,

•  sympathetic,

•  reactive,

•  sensitive,

•  demonstrative,

•  emotional,

•  fervent,

•  fervid,

•  hot-blooded,

•  impassioned,

•  passional,

•  passionate,

•  vehement