The LSAT is going to present many words that are not used on an every
day basis. For ALL of the words where we are less than 100% certain of
the meaning, I highly recommend you take down the word and AFTER your
practice you seek out the definition of the word using an online
dictionary and use the word in, at least, one sentence.
Virtually no one is going to know all the words that are presented to
them on this test. Those who learned English as a second language need
to be particularly resilient when it comes to learning vocabulary.
Few people are willing to take these steps in order to improve
themselves. Be one of those people!