perspicacious
adjective /ˌpɜːspɪˈkeɪʃəs/
/ˌpɜːrspɪˈkeɪʃəs/
(formal)- able to understand somebody/something quickly and accurately; showing this
- a perspicacious remark
- He was perspicacious enough to realize that things were soon going to change.
Word Originearly 17th cent.: from Latin perspicax, perspicac- ‘seeing clearly’ + -acious.