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English definition of “harden”

harden

verb [I or T] (SEVERE)    /ˈhɑː.dən/ US  /ˈhɑːr-/
to become more severe , determined , or unpleasant : Living rough in the desert hardened the recruits a lot (= made them stronger ). As the war progressed , attitudes on both sides hardened (= became more severe and determined ).Becoming and making stronger hardening     /-ɪŋ/ noun [U or S] There has been a hardening of government policy since the invasion .Hard and firm
(Definition of harden verb (SEVERE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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