subtle
adjective
1. difficult to detect or grasp by the mind or analyze
- his whole attitude had undergone a subtle change
- a subtle difference
Similar word(s): impalpable, elusive
2. able to make fine distinctions
- a subtle mind
Similar word(s): perceptive
3. working or spreading in a hidden and usually injurious way
- a subtle poison
Similar word(s): harmful, insidious, pernicious
Sentences with subtle as an adjective:
- The difference is subtle, but you can hear it if you listen carefully.