Bur·den·some a. Grievous to be borne; causing uneasiness or fatigue; oppressive.
The debt immense of endless gratitude
So burdensome. --Milton.
Syn: -- Heavy; weighty; cumbersome; onerous; grievous; oppressive; troublesome.
-- Bur*den*some*ly, adv. -- Bur*den*some*ness, n.
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burdensomeness
n : unwelcome burdensome difficulty [syn: onerousness, oppressiveness]