1. With undue hurry and confusion
   "a pell-mell dash for the train"
   - helter-skelter

1. In a wild or reckless manner
   "running pell-mell up the stairs"
   - harum-scarum

See also: hurried

• unperplexed
• unperson
• unpersuadable
• unpersuaded
• unpersuasive
• unpersuasiveness
• unperturbed
• unpick
• unpictured
• unpicturesque
• unpierced
• unpigmented
• unpillared
• unpin
• unpitying
• unplaced
• unplanned
• unplanted
• unplastered
• unplayable
• unplayful
• unpleasant
• unpleasant person
• unpleasant woman
• unpleasant-smelling