1. Defying expression or description
   "a thing of untellable splendour"
   - indefinable, indescribable, ineffable, unspeakable, unutterable

See also: inexpressible, unexpressible

• uncontroversially
• unconventional
• unconventionality
• unconventionally
• unconverted
• unconvertible
• unconvinced
• unconvincing
• unconvincingly
• uncooked
• uncool
• uncooperative
• uncoordinated
• uncordial
• uncork
• uncorrectable
• uncorrected
• uncorrelated
• uncorroborated
• uncorrupted
• uncountable
• uncountable noun
• uncounted
• uncouple
• uncoupled