difficulty

noun6

1. •
   the state of needing much effort and care, so that something is not easy to do

   • My mom is old and has a lot of difficulty (in) remembering all her grandchildren's names.
2. •
   An obstacle that hinders achievement of a goal.

   • We faced a difficulty in trying to book a flight so late.
3. •
   That which cannot be easily understood or believed.
4. •
   [in the plural] Physical danger from the environment, especially with risk of drowning

   • 2012 August 2, "Children rescued after getting into difficulties in Donegal" BBC Online — 2012
5. •
   An awkward situation or quarrel.
6. •
   An objection.