hard·en·er 
(härdn-ər)
(härdn-ər)n.
One that hardens, especially a substance added to varnish or paint to give it a harder surface or finish.
| 单词 | hardener |
| 释义 | hard·en·er (härdn-ər)n. One that hardens, especially a substance added to varnish or paint to give it a harder surface or finish. |
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