unsatisfactory

[uhn-sat-is-fak-tuh-ree]
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Origin of unsatisfactory

First recorded in 1630–40; un-1 + satisfactory
Related formsun·sat·is·fac·to·ri·ly, adverbun·sat·is·fac·to·ri·ness, noun

Synonyms for unsatisfactory

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British Dictionary definitions for unsatisfactory

unsatisfactory

adjective
  1. not adequate or suitable; unacceptable
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

Word Origin and History for unsatisfactory
adj.

1640s, from un- (1) "not" + satisfactory.

Online Etymology Dictionary, © 2010 Douglas Harper