[syn: penetrative, penetrating]
The Collaborative International Dictionary of English v.0.48:
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.
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            His look became keen and penetrative. --Hawthorne.
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   2. Having the power to affect or impress the mind or heart;
      impressive; as, penetrative shame. --Shak.
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   3. Acute; discerning; sagacious; as, penetrative wisdom. "The
      penetrative eye." --Wordsworth.
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            Led on by skill of penetrative soul.  --Grainger.
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WordNet (r) 3.0 (2006):
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,
           penetrative, 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:
       penetrative, penetrating]