HackerVoca

peer : equal, mate, match
penetrate : pierce, permeate
penetrating : piercing, sharp, acute, keen, shrewd / / adjective

1 good at judging what people or situations are really like, especially in a way that makes you successful in business, politics etc: Martin's a shrewd judge of character. | a shrewd businesswoman

2 well judged and likely to be right: At a shrewd guess, I'd say Henry is going to leave his job. | have a shrewd idea (=have an opinion about something that is probably correct)

shrewdly adverb : where you jealous of her? ?asked Sara shrewdly.
shrewdness noun [uncountable]