Similar words: roughen, ploughed, tough, toughness, high-end, rough, dough, bough. Meaning: ['tʌfn] 
v. make tough or tougher.
v. make tough or tougher. 
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31. Acrylate -terminated and maleic acid -terminated liquid rubbers were synthesized and applied to toughen UP.
32. It also summarized the applications of nano - composites in toughen - reinforced, constructional, conductive and optical material.
33. He pioneered medico-athletics in China. He believed that physical exercises could toughen the body, cure diseases, and prolong life.
33. Sentencedict.com is a sentence dictionary, on which you can find excellent sentences for a large number of words.
34. The acrylate terminated and maleic acid terminated liquid rubbers were prepared and used to toughen UP.
35. In an attempt to distance himself from the Libyans, Brown moved to toughen his position against Colonel Gaddafi after Libya's leader theatrically tore up the UN charter in his address.
36. Mr Cameron would toughen the rules under which sponging migrants can claim benefits.
37. But it would also toughen penalties for union violations, and it would make it easier for businesses to call elections to try to decertify a union.
38. Electrospun PSF nanofibrous membranes were prepared to toughen TGDDM epoxy resin.
39. The new dual - functional toughening agent SWR - 3 C was used to toughen nylon ( PA ) 6.
40. But our boss started to talk, curassow also has upgrade of toughen one's scalp-brace oneself to rush only.
41. A public debate is needed on these and other proposals to toughen Sarbanes - Oxley's sanctions.