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English definition of “strengthen”

strengthen

verb [I/T] (BECOME EFFECTIVE)   /ˈstreŋk·θən, ˈstreŋ-/
to become more effective, or to make something more effective: [T] Somehow his illness strengthened their marriage and brought them closer together. [T] Parents can strengthen ties with their children.
(Definition of strengthen verb (BECOME EFFECTIVE) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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