difficult to understand or explain
The mysterious letter arrived without a return address.
Vocabulary like mysterious 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.
ordinary and lacking excitement
wall painting; a painting that is applied to a wall surface
think over; reflect deeply on a subject
changeable; capable of or tending to change in form or quality or nature
not speaking or silent
rebellious; disposed to or in a state of mutiny
shared; common to or shared by two or more parties
a very large number
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