Boost your SAT score and impress your peers with these five indispensable vocabulary words.

Quick SAT Lesson: Five Essential Vocabulary Words

1. deserted or abandoned, as by an owner, occupant, etc
2. (Architecture) falling into ruins; neglected; dilapidated
3. neglectful of duty or obligation
"A new shopping center will be built on the derelict land."

being very careful to notice things, esp. signs of danger. "Security personnel need to be more vigilant in checking bags and packages."

the state of not knowing, ignorance. "Knowledge cannot thrive where there is nescience."

showing no intelligence or imagination. syn. absurd  "He's attractive but vapid." "What an absurd thing to say!"

a guide who conducts and informs sightseers. "The cicerone was very informative during the trip."