1. Not challenging; dull and lacking excitement
   - commonplace, humdrum, prosaic, unglamorous

See also: unexciting

• odontoid
• odontoid process
• odontology
• Odontophorus
• odor
• odorant
• odoriferous
• odorise
• odorize
• odorless
• odorous
• odour
• odourise
• odourless
• Odovacar
• inflexibleness
• inflexibly
• inflexion
• inflict
• infliction
• inflictive
• infliximab
• inflorescence
• inflow
• inflowing