percipient
From Longman Dictionary of Contemporary Englishpercipientper‧cip‧i‧ent /pəˈsɪpiənt $ pər-/ adjective formal NOTICEUNDERSTANDquick to notice and understand things SYN perceptive —percipience noun [uncountable]Examples from the Corpuspercipient• Thus one percipient observer, Richard Hofstadter, in 1955.Origin percipient (1600-1700) Latin present participle of percipere; → PERCEIVE