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| substance that causes or accelerates a chemical reaction without itself being affected |
| stiff, ungainly, or awkward, without spirit, animation, or awareness |
| approbation (ˌæprəˈbeɪʃən) | |
| —n | |
| 1. | commendation; praise |
| 2. | official recognition or approval |
| 3. | an obsolete word for proof |
| 'approbative | |
| —adj | |
| 'approbatory | |
| —adj | |