The Collaborative International Dictionary
Inimitability
Inimitability \In*im`i*ta*bil"i*ty\, n.
The quality or state of being inimitable; inimitableness.
--Norris.
Douglas Harper's Etymology Dictionary
inimitability
1711, from inimitable + -ity.
Wiktionary
inimitability
n. The property or status of being inimitable.