validate; establish the authenticity of something
Experts will authenticate the painting to determine if it is a genuine Rembrandt.
Vocabulary like authenticate 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.
weaken; weaken the consistency of (a chemical substance)
mindset; a complex mental state involving beliefs, feelings, and values
gradual reduction; erosion by friction
reckless; invulnerable to fear or intimidation
add; increase; enlarge or increase
encouraging; auguring favorable circumstances and good luck
stark; severely simple
genuine and true to origin
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