Synonyms: stressful, trying, nerve-racking, nerve-wracking
Definition: extremely irritating to the nerves
Usage: nerve-racking noise; the stressful days before a war; a trying day at the office
Synonyms: trying
Definition: hard to endure
Usage: fell upon trying times
Similar words: difficult, hard
Definition: not easy; requiring great physical or mental effort to accomplish or comprehend or endure
Usage: a difficult task; nesting places on the cliffs are difficult of access; difficult times; why is it so hard for you to keep a secret?