Reciprocal.
Involving reflection.
That reveals or shows; revealing; indicative of.
That reflects, or redirects back to the source.
Pondering, especially thinking back on the past.
Nigh accurate.
Sharp, snithy, piercing.
Showing clever resourcefulness in practical matters.
Streetwise, street-smart.
Knowledgeable, intelligent, keen.
Artful, tricky or cunning.
Severe, intense, hard.