Source : Webster's Revised Unabridged Dictionary (1913)

Penetrative \Pen"e*tra*tive\, a. [Cf. F. p['e]n['e]tratif.]
   1. Tending to penetrate; of a penetrating quality; piercing;
      as, the penetrative sun.

            His look became keen and penetrative. --Hawthorne.

   2. Having the power to affect or impress the mind or heart;
      impressive; as, penetrative shame. --Shak.

   3. Acute; discerning; sagacious; as, penetrative wisdom.
      ``The penetrative eye.'' --Wordsworth.

            Led on by skill of penetrative soul.  --Grainger.

Source : WordNet®

penetrative
     adj 1: having or demonstrating ability to recognize or draw fine
            distinctions; "an acute observer of politics and
            politicians"; "incisive comments"; "icy knifelike
            reasoning"; "as sharp and incisive as the stroke of a
            fang"; "penetrating insight"; "frequent penetrative
            observations" [syn: {acute}, {discriminating}, {incisive},
             {keen}, {knifelike}, {penetrating}, {piercing}, {sharp}]
     2: tending to penetrate; having the power of entering or
        piercing; "a toxic penetrative spray applied to the
        surface"; "a cold penetrating wind"; "a penetrating odor"
        [syn: {penetrating}]