hinder, delay, impede, slow down; see delay 1, hinder.
"retard." YourDictionary, n.d. Web. 12 October 2018. <http://thesaurus.yourdictionary.com/retard>.
retard. (n.d.). Retrieved October 12th, 2018, from http://thesaurus.yourdictionary.com/retard
To cause to be later or slower than expected or desired:
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