1. In a painful manner.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• distressful,
• sistressfully,
• xistressfully,
• cistressfully,
• fistressfully,
• ristressfully,
• eistressfully,
• dustressfully,
• djstressfully,
• dkstressfully,
• dostressfully,
• d9stressfully,
• distresefully,
• distressefully,
• dstressfully,
• distresfully,
• distressfuly,
• destressfully,
• distressefuly,
• distresffully

• distress call,
• distressingly,
• distrustful,
• distressed,
• distress signal,
• distressing,
• distrustfully,
• distrustfulness,
• distressful,
• distressfulness.

The adjective form of the word "distressfully" is "distressful".