IMPERTRUBABLE

\ɪmpˈɜːtɹuːbəbə͡l], \ɪmpˈɜːtɹuːbəbə‍l], \ɪ_m_p_ˈɜː_t_ɹ_uː_b_ə_b_əl]\
Sort: Oldest first
 
2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.