1. In a believable manner
   "he acted believably sincere" 
2. Easy to believe on the basis of available evidence
   - credibly, plausibly, probably, tenably

See also: believable

Antonym: unbelievably

• Sami
• Samia
• Samia cynthia
• Samia walkeri
• Samian
• Samian ware
• crenated
• crenation
• crenature
• crenel
• crenelate
• crenelation
• crenellate
• crenellation
• crenelle
• crenulate
• crenulated
• creole
• creole-fish
• creolise
• creolize
• Creon
• creosol
• creosote
• creosote bush