1. Causing or marked by grief or anguish
   "her sigh was heartbreaking"
   - grievous, heartrending

See also: sorrowful

• cottonseed
• cottonseed cake
• cottonseed oil
• cottontail
• cottontail rabbit
• cottonweed
• cottonwick
• cottonwood
• cottony
• cottony-white
• Cottrell precipitator
• Cottus
• Cotula
• Cotula coronopifolia
• Coturnix
• Coturnix communis
• Coturnix coturnix
• cotyledon
• cotyloid
• cotyloid cavity
• cotyloid joint
• cotyloidal
• coucal
• couch
• couch grass