burdensomely

from The Collaborative International Dictionary of English v.0.48

Burdensome \Bur"den*some\, a.
   Grievous to be borne; causing uneasiness or fatigue;
   oppressive.
   [1913 Webster]

         The debt immense of endless gratitude
         So burdensome.                           --Milton.
   [1913 Webster]

   Syn: Heavy; weighty; cumbersome; onerous; grievous;
        oppressive; troublesome.
        [1913 Webster] -- {Bur"den*some*ly}, adv. --
        {Bur"den*some*ness}, n.
        [1913 Webster]