American Heritage Dictionary
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Century Dictionary
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GNU Webster's 1913
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WordNet
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Elsewhere on the web
It is really ghapsignaphthing ( 'fascinating': gh as in tough, ti as in nation, gn as in gnaw, phth as in phthisic) to me.— VERBATIM: The Language Quarterly Vol VII No 4
TONY RANDALL: Well, it's tough -- to an actor, what's tough is the length of the part.— CNN Transcript Jan 21, 2005
We'll keep that picture up, show it to our viewers to make sure we don't miss the start when Patrick Fitzgerald, often described as a tough-as-nails prosecutor, walks in.— CNN Transcript Oct 28, 2005
Tough has been looked up 289 times, favorited 0 times, listed 10 times, and commented on once.

American Heritage Dictionary (1)
Century Dictionary (1)
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