Synonyms for Penetrating:

adj.

all (adjective)
penetrative.
high (adjective)
treble.
intelligent (adjective)
acute, incisive, quick, keen, penetrative, perceptive, discriminating.
sharp (adjective)
pointed, sharp.
shrill (adjective)
creaky, scraping, grating, harsh, cutting, whining, acute, high-pitched, shrieking, scratching, whistling, squeaky, raucous, piercing, squealing, reedy, Caterwauling, rasping, strident, screeching, ear-piercing, treble, shrill, hoarse, screaming, jarring, jangling.
stinging, harsh (adjective)
cutting, sharp, Puncturing, Infiltrating, permeating, shrill, pointed, trenchant, piercing.

n.

able, bright, wise, brilliant, quick, smart, academic. conversant, knowledgeable, familiar with something, clued up, au fait, omniscient, intelligent, awake to something, informed, aware. appealing, brittle, croaky, adenoidal, careful, disembodied, trenchant, sensitive, dead, probing, flat, breathy, fruity. far-flung, scattered, all over the place, widespread, countrywide, ubiquitous, nationwide, worldwide, generalized, diffuse. penetrating (noun)
acute, knifelike, sharp, piercing, discriminating, penetrative, keen, perceptive, incisive.

v.

infusing (verb)
permeating, Glutting, Imbuing, soaking, Infusing, Impregnating, filling, Suffusing, pervading, Saturating, instilling, seething.
inserting (verb)
Embedding, Injecting, Introducing, Insinuating, intruding, Inserting, Infiltrating, Interposing, Implanting, lodging.
perforating (verb)
pointing, sticking, poking, Punching, needling, Gouging, Spearing, Lancing, Puncturing, Skewering, Spiking, Perforating, boring, drilling.

Other synonyms:

intelligent, probing. brilliant. trenchant. sensitive. Other relevant words:
bright, aware, perceptive, informed, knowledgeable, wise, quick, probing, knifelike, intelligent, discriminating, widespread, pointed, trenchant, incisive, penetrative, keen, ubiquitous, smart, careful, brilliant, sharp, sensitive.

Usage examples for penetrating

  1. The eagerness of the enemy in penetrating as far as Dresden has been extreme. – The Project Gutenberg Memoirs of Napoleon Bonaparte by Bourrienne, Constant, and Stewarton
  2. The light of the clearing sky, at once soft and penetrating fell full on her. – The Black Robe by Wilkie Collins
  3. It had grown much clearer and more penetrating with years. – Countess Erika's Apprenticeship by Ossip Schubin