REINFORCEMENT

[noun] [U]The harbour walls need urgent reinforcement (= They need strengthening).The report stated that the highway collapsed because it was supported by columns that lacked steel reinforcement (= they contained no steel to strengthen them).The government's latest economic policy is a reinforcement of (= a way to strengthen) their earlier attempts to conquer inflation.The government has agreed to the reinforcement of UN troops in (= to send in more soldiers and weapons to) the war zone.