strength·en 
/ˈstrɛŋkθən/ verb
strength·ens; strength·ened; strength·en·ing /ˈstrɛŋkθən/ verb 1 [+ obj] : to make (someone or something) stronger, more forceful, more effective, etc.
▪ These exercises will strengthen your stomach muscles. ▪ He takes herbs to strengthen his immune system. ▪ The development of new electronic products has strengthened the company's position as the leader in digital technology. ▪ Holidays often serve to strengthen bonds between family members. ▪ Their financial situation strengthened her determination to find a new career. ▪ The team has been strengthened by the addition of several new players. 2 [no obj] : to become stronger, more forceful, more effective, etc.
▪ The winds are expected to strengthen. ▪ The storm is continuing to strengthen [=to become more powerful] as it approaches land. ▪ Her determination has strengthened. ▪ The economy is slowly strengthening. 3 of money : to increase in value when compared to money from other countries [no obj] ▪ The Canadian dollar is strengthening against the U.S. dollar. [+ obj] ▪ The trade restrictions will strengthen the pound. — opposite weaken
▪ These exercises will strengthen your stomach muscles. ▪ He takes herbs to strengthen his immune system. ▪ The development of new electronic products has strengthened the company's position as the leader in digital technology. ▪ Holidays often serve to strengthen bonds between family members. ▪ Their financial situation strengthened her determination to find a new career. ▪ The team has been strengthened by the addition of several new players.
▪ The winds are expected to strengthen. ▪ The storm is continuing to strengthen [=to become more powerful] as it approaches land. ▪ Her determination has strengthened. ▪ The economy is slowly strengthening.
