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touch system
touch-tone
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touch up
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touché
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toughness
tough·ness [ túfnəss ]


noun 
Definition:
 
1. state of being tough: the fact or quality of being tough
2. resistance of metal to stress: the resistance of a metal to breaking under repeated twisting and bending forces, measured in kilojoules
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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