KEY: Penetrable.
SYN: Pervious, permeable.
ANT: Impervious, impermeable.
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KEY: Penetration.
SYN: Discernment, observation, sagacity, acuteness, discrimination, insight, sharpness.
ANT: Indiscernment, dulness, indiscrimination, stolidity, hebetude, shortsightedness, shallowness, obtuseness.
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KEY: Penitence.
SYN: Repentance, contrition, sorrow, remorse.