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crass  (crasser comparative) (crassest superlative )Crass behaviour is stupid and does not show consideration for other people.  adj 
The government has behaved with crass insensitivity...  
 crassly  adv ADV adj, ADV with v 
...one of the most crassly stupid political acts of modern times..., These teachings can be crassly misinterpreted.  

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"Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 © HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"