Synonyms for subtle

Adjective

1. elusive, subtle, impalpable (vs. palpable)

usage: 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. subtle, delicate (vs. rugged)

usage: faint and difficult to analyze; "subtle aromas"

3. subtle, perceptive (vs. unperceptive)

usage: able to make fine distinctions; "a subtle mind"

4. insidious, pernicious, subtle, harmful (vs. harmless)

usage: working or spreading in a hidden and usually injurious way; "glaucoma is an insidious disease"; "a subtle poison"