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noun
CEFR C1
an unshakable belief in something without need for proof or evidence
Brevlex writes every example sentence around your interests, then schedules it with spaced repetition so it sticks. No generic textbook line — a sentence for you.
Each source is a real, checkable word list that contains conviction. We never claim an official exam-board list — none is published for the GRE, GMAT, or SAT.