knocks down (verb) acquaint: inform oneself or another about something new
Sinonime: acute,
alert, astute,
bright, clever, intelligent,
keen,
nimble, on the ball,
perceptive,
quick, quick-thinking, quick-witted,
savvy,
sharp,
shrewd, smart
Antonime: conceal,
deceive, falsify,
hide,
hold back,
mislead,
misrepresent,
withhold