1. Difficult to deal with
   "a troublesome infection"; "a troublesome situation"

See also: difficult, hard, troublesomeness

• ngultrum
• Nguni
• Nguyen Tat Thanh
• ngwee
• NH
• NHS
• Ni
• Ni-hard
• Ni-hard iron
• Ni-resist
• Ni-resist iron
• niacin
• Niagara
• Niagara Falls
• Niagara River
• Niamey
• nib
• nibbed
• nibble
• nibbler
• Nibelung
• Nibelungenlied
• niblick
• nicad
• Nicaea