required; morally or legally constraining or binding
Wearing a seatbelt is obligatory in most states while driving.
Vocabulary like obligatory 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.
ill famed; known widely and usually unfavorably
something new and unusual
invalidate; declare invalid
foster; help develop, help grow
source of nourishment; any substance metabolized by an animal
stubborn; stubbornly persistent in wrongdoing
make obscure; make obscure or unclear
a duty or responsibility to act
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