1. Feeling or showing little interest or enthusiasm
   "a halfhearted effort"
   - half-hearted, tepid, lukewarm

See also: half-heartedly, unenthusiastic

• orphenadrine
• Orpheus
• orphic
• orphrey
• orpiment
• orpin
• orpine
• Orpington
• Orr
• orrery
• orris
• orrisroot
• Orson Welles
• ort
• Ortalis
• ortanique
• Ortega
• Ortega y Gasset
• orthicon
• Orthilia
• ortho-
• orthoboric acid
• orthocenter
• orthocentre
• orthochorea