subtler , subtlest
Something that is subtle is not immediately obvious or noticeable.
the slow and subtle changes that take place in all living things.
所有生物中发生的缓慢而不易察觉的变化。
Intolerance can take subtler forms too.
不宽容也可能以微妙的形式表现。
There is a subtle distinction between a withdrawal and a retreat.
撤回和撤退之间的差别很微妙。
A subtle person cleverly uses indirect methods to achieve something.
I even began to exploit him in subtle ways.
我甚至开始不露声色地利用他。