1. extremely unpleasant, difficult, or painful
Usage: informal
2. relating to or resembling hell

Examples

• The traffic was hellish during rush hour.
• She endured a hellish week of final exams.
• The hellish heat made it impossible to sleep.
• The movie depicted hellish scenes of torment.
• It was a hellish journey through the storm.
• The hellish noise from construction kept everyone awake.