transitive. To insert the keystone in (an arch).
| 单词 | θ228971 | 
| 释义 | society > leisure > the arts > visual arts > architecture > arch > 			[verb (transitive)]		 > insert keystone into (2)		 key1735 transitive. To insert the keystone in (an arch). to key in1751 transitive. To insert the keystone in (an arch). Cf. sense 5. Now rare.  | 
	
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