1. In a hellish manner.

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

• follishly,
• gellishly,
• bellishly,
• nellishly,
• jellishly,
• uellishly,
• yellishly,
• hwllishly,
• hsllishly,
• hdllishly,
• hellisly,
• helilshly,
• helllishly,
• hallishly,
• hellesly,
• helleishly,
• hellishley,
• hellihslly,
• hilishly,
• hellisihly

• helsley,
• dollishly,
• helsel.

The adjective form of the word "hellishly" is "hellish".