UNCONSTRAINED

\ʌnkənstɹˈe͡ɪnd], \ʌnkənstɹˈe‍ɪnd], \ʌ_n_k_ə_n_s_t_ɹ_ˈeɪ_n_d]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd
 
1908 - Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson