[noun] fearful expectation or anticipation; "the student looked around the examination room with apprehension" Synonyms:apprehensiveness, dread
[noun] the cognitive condition of someone who understands; "he has virtually no understanding of social cause and effect" Synonyms:understanding, discernment, savvy
[noun] the act of apprehending (especially apprehending a criminal); "the policeman on the beat got credit for the collar" Synonyms:arrest, catch, collar, pinch, taking into custody