Difficulty
WordNet
noun
(1) An effort that is inconvenient
"I went to a lot of trouble"
"He won without any trouble"
"Had difficulty walking"
"Finished the test only with great difficulty"
(2) The quality of being difficult
"They agreed about the difficulty of the climb"
(3) A factor causing trouble in achieving a positive result or tending to produce a negative result
"Serious difficulties were encountered in obtaining a pure reagent"
(4) A condition or state of affairs almost beyond one's ability to deal with and requiring great effort to bear or overcome
"Grappling with financial difficulties"