subtle
英 ['sʌt(ə)l]
美['sʌtl]
	    - adj. 微妙的;精细的;敏感的;狡猾的;稀薄的
 
英英释意
- 1. be difficult to detect or grasp by the mind;
 - "his whole attitude had undergone a subtle change"
 - "a subtle difference"
 - "that elusive thing the soul"
 
- 2. faint and difficult to analyze;
 - "subtle aromas"
 
- 3. able to make fine distinctions;
 - "a subtle mind"
 
- 4. working or spreading in a hidden and usually injurious way;
 - "glaucoma is an insidious disease"
 - "a subtle poison"