trivet
/ˈtrɪvɪt/noun
1- an iron tripod placed over a fire for a cooking pot or kettle to stand on（放在火上支承锅或水壶的）三脚铁架。
1.1
- an iron bracket designed to hook on to bars of a grate for a similar purpose（钩在壁炉炉栅上用于支承锅、壶的）支架。
1.2
- a stand or support with three or more legs三脚台, 支架, 支柱。
短语
(as) right as a trivet
- Brit. informal perfectly all right; in good health〈英, 非正式〉一切正常; 非常健康。
词源
late Middle English: apparently from Latin tripes, triped- 'three-legged', from tri- 'three' + pes, ped- 'foot'.