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1.
an effort that is inconvenient
had difficulty walking
finished the test only with great difficulty
2.
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
3.
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
4.
the quality of being difficult
they agreed about the difficulty of the climb
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