FreeVocabulary
Perspicacious
/ˌpɜːrspɪˈkeɪʃəs/ adjective hardHaving sharp insight and good judgment; quick to notice what others miss.
The perspicacious detective spotted the forged signature that everyone else had overlooked.
Memory Trick
Contains 'spec/spic,' meaning to see (as in 'spectacle') — a perspicacious person sees straight through a problem.