SimilarityRank
difficult 0.843 2515
extremely_difficult 0.809 93625
be_very_difficult 0.769 37607
a_difficult 0.745 12053
be_extremely_difficult 0.713 97037
more_difficult 0.704 14322
very_hard 0.650 41193
,_if_not_impossible 0.637 78666
the_most_difficult 0.633 35489
tricky 0.628 23559
impossible 0.627 8196
be_not_easy 0.622 17254
be_very_hard 0.622 91214
frustrating 0.611 15978
difficult_for 0.604 44678
not_easy 0.602 65092
arduous 0.592 48005
be_the_most_difficult 0.588 91080
it_be_difficult 0.588 31149
complicated 0.574 9149
very_dangerous 0.572 73434
it_be_very_difficult 0.570 71675
challenging 0.566 6371
more_challenging 0.563 31394
very_complex 0.563 68176