perspicacious


Concise Oxford English Dictionary © 2008 Oxford University Press:
perspicacious /ˌpəːspɪˈkeɪʃəs/
adjective having a ready insight into and understanding of things.
– derivatives
perspicaciously adverb,
perspicacity noun.
– origin C17: from L. perspicax, perspicac- ‘seeing clearly’ + -acious.
'perspicacious' also found in these Oxford entries:

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