unspeakable
adjective
[ ʌnˈspiːkəb(ə)l ]
• not able to be expressed in words.
• "I felt an unspeakable tenderness towards her"
Similar:
indescribable,
beyond words,
beyond description,
inexpressible,
unutterable,
indefinable,
beggaring description,
ineffable,
unimaginable,
inconceivable,
unthinkable,
unheard of,
marvellous,
wonderful,