UNDERGRUB
\ˌʌndəɡɹˈʌb], \ˌʌndəɡɹˈʌb], \ˌʌ_n_d_ə_ɡ_ɹ_ˈʌ_b]\
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2010
- New Age Dictionary Database
By Oddity Software
1913
- Webster's Revised Unabridged Dictionary
By Noah Webster.
1919
- The Concise Standard Dictionary of the English Language
By James Champlin Fernald
