1. Constituting a tube; having hollow tubes (as for the passage of fluids)
   - tubular, cannular, tube-shaped, vasiform

See also: hollow

• unpersuasiveness
• unperturbed
• unpick
• unpictured
• unpicturesque
• unpierced
• unpigmented
• unpillared
• unpin
• unpitying
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• unplanned
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• unplayable
• unplayful
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• unpleasant person
• unpleasant woman
• unpleasant-smelling
• unpleasantly
• unpleasantness
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• unpleasingness
• unpledged