1bur·den 
/ˈbɚdn̩/ noun
plural bur·dens /ˈbɚdn̩/ noun [count] 1 : something heavy that is carried : load
▪ They feared the donkey would collapse under the extra burden. — see also beast of burden 2 : someone or something that is very difficult to accept, do, or deal with
▪ a (heavy) burden of sorrow/guilt ▪ She had to bear/shoulder the burden of caring for her aging parents. ▪ The tax burden has been falling increasingly on the middle class. [=middle class people have been paying a greater portion of taxes] ▪ The burden of proof is on the plaintiff, since the defendant is presumed innocent until proven guilty. [=the plaintiff must prove that the defendant is guilty] ▪ the company's large debt burden [=the large amount of money that the company owes] — often + on ▪ His illness has placed a huge financial burden on the family. ▪ I'm sorry to be such a burden on you.
▪ They feared the donkey would collapse under the extra burden. — see also beast of burden
▪ a (heavy) burden of sorrow/guilt ▪ She had to bear/shoulder the burden of caring for her aging parents. ▪ The tax burden has been falling increasingly on the middle class. [=middle class people have been paying a greater portion of taxes] ▪ The burden of proof is on the plaintiff, since the defendant is presumed innocent until proven guilty. [=the plaintiff must prove that the defendant is guilty] ▪ the company's large debt burden [=the large amount of money that the company owes] — often + on ▪ His illness has placed a huge financial burden on the family. ▪ I'm sorry to be such a burden on you.
burden has been lifted from your shoulders/back — see 1lift
