Longman Dictionary of Contemporary English homepage

Date: 1400-1500
Origin: inforce (14-17 centuries), from enforce

reinforce

verb
     
Related topics: Military
re‧in‧force W3 [transitive]
1 to give support to an opinion, idea, or feeling, and make it stronger:
The film reinforces the idea that women should be pretty and dumb.
2 to make part of a building, structure, piece of clothing etc stronger
3PM to make a group of people, especially an army, stronger by adding people, equipment etc

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