1. Not able to be ascertained; resisting discovery
   - unascertainable

See also: indeterminable, undeterminable

• attestation service
• attestator
• attested
• attester
• attestor
• attic
• attic fan
• Attica
• Atticus
• Atticus atlas
• Attila
• Attila the Hun
• Attilio
• attire
• attired
• attitude
• attitudinal
• attitudinise
• attitudinize
• Attlee
• attn
• atto-
• attorn
• attorney
• Attorney General