Similar words: at the double, redoubtable, double, double up, double room, double back, double check, double-decker. Meaning: [‚rdɪː'dʌbl] 
v. 1. double in magnitude, extent, or intensity 2. double again 3. make twice as great or intense.
v. 1. double in magnitude, extent, or intensity 2. double again 3. make twice as great or intense. 
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31) If I double the value, I must redouble our efforts.
32) China will continue to redouble its efforts to comprehensively and effectively implement the export control regulations as well as continuously improve the export control system.
33) Any double or redouble is superseded by a subsequent legal bid.
More similar words: at the double, redoubtable, double, double up, double room, double back, double check, double-decker, double-header, double-dealing, double cropping, double jeopardy, double entendre, doubly, doubloon, doubling, redound, rouble, trouble, troubled, in trouble, untroubled, troublesome, troubleshooter, doubt, no doubt, doubtful, doubtfully, washed out, weed out.