unnoticeable; impossible or difficult to perceive by the mind or senses
The change in temperature was imperceptible to most people in the room.
Vocabulary like imperceptible appears on the Digital SAT in Words-in-Context questions, where you choose the word that fits a passage's meaning and tone. You can also drill this word with vocabulary flashcards.
give; transmit (knowledge or skills)
impossible to pass; incapable of being passed
filled with strong emotion
expressionless; having or revealing little emotion or sensibility
faultless; without fault or error
penniless; not having enough money to pay for necessities
hinder; be a hindrance or obstacle to
force; urge or force (a person) to an action; constrain or motivate
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