THIRTY-FIRST

\θˈɜːtifˈɜːst], \θˈɜːtifˈɜːst], \θ_ˈɜː_t_i_f_ˈɜː_s_t]\
Sort: Oldest first
 
2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd