redouble[verb]Synonyms: intensify, aggravate, deepen, enhance, heighten, intensate, magnify, mount, rise, rouse
[TahlilGaran] English Synonym Dictionary ▲
re‧doub‧le /riːˈdʌb
əl/
verb redouble your efforts to greatly increase your effort as you try to do something:
Both sides redoubled their efforts to end the war. [TahlilGaran] Dictionary of Contemporary English ▲