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sironize

British  
/ ˈsaɪrəˌnaɪz /

verb

  1. (tr) to treat (a woollen fabric) chemically to prevent it wrinkling after being washed

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of sironize

C20: from ( C ) SIRO + -n- + -ize