perspicacious
Pronunciation:
/ˌpɜː.spɪˈkeɪ.ʃəs//ˌpɜːɹ.spɪˈkeɪ.ʃəs/adjective
Definitions
Of acute discernment; having keen insight; mentally perceptive.
Able to physically see clearly; quick-sighted; sharp-sighted.