How to sign: move deeply
"This book upset me"; "A troubling thought";
Similiar / Same: disturb, upset
Categories: affect, impress, move, strike
Within this category: agitate, distress, jolt, perturb
How to sign: disturb in mind or make uneasy or cause to be worried or alarmed
"She was rather perturbed by the news that her father was seriously ill";
Similiar / Same: perturb, unhinge, disquiet, cark, disorder, distract
Categories: disturb, trouble, upset
Within this category: worry
How to sign: a source of difficulty
"one trouble after another delayed the job"; "what's the problem?";
Similiar / Same: problem
Categories: difficulty
Within this category: can of worms, deep water, growing pains, hydra, matter