to redouble
01
to strengthen markedly
Formal
例
After the criticism, she redoubled her efforts to improve her performance.
The teacher redoubled vigilance to ensure students followed the safety rules.
02
to increase a quantity, number, or amount twofold once more
例
The investors decided to redouble their initial capital after seeing early profits.
Production was redoubled to meet the growing demand for masks.
語彙ツリー
redouble
double
