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English definition of “subtle”

subtle

adjective  /ˈsʌt̬·əl/ us  
not loud, bright, noticeable, or obvious: subtle flavors a subtle shade of pink The subtle nuances of English pronunciation are hard to master. Subtle can also mean small but important: There are subtle differences between the two.
subtly
adverb  /ˈsʌt̬·əl·i, ˈsʌt·li/ us  
He subtly affects the lives of everyone he encounters.
(Definition of subtle from the Cambridge Academic Content Dictionary © Cambridge University Press)
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