" burdensome "

1: difficult to endure;

  * e.g., " ... the burdensome living conditions that the early settlers had to endure "

•  Synonyms : 

•  bitter,

•  brutal,

•  cruel,

•  excruciating,

•  grievous,

•  grim,

•  hard,

•  hardhanded,

•  harsh,

•  heavy,

•  inhuman,

•  murderous,

•  onerous,

•  oppressive,

•  rough,

•  rugged,

•  searing,

•  severe,

•  stiff,

•  tough,

•  trying

•  Antonyms : 

•  easy,

•  light,

•  soft

2: requiring much time, effort, or careful attention;

  * e.g., " ... the burdensome task of finishing the tax return "

•  Synonyms : 

•  arduous,

•  challenging,

•  demanding,

•  exacting,

•  grueling,

•  killing,

•  laborious,

•  onerous,

•  persnickety,

•  taxing,

•  toilsome

•  Antonyms : 

•  light,

•  nondemanding,

•  unchallenging,

•  undemanding