"Subtle" changes are small changes that can hardly be noticed.
Subtle can go both ways: either subtle/subtler/subtlest, or subtle/more subtle/most subtle. Both are correct.
Her perfume was so subtle that he could only catch a hint of it when she passed by.
The "b" is subtle is silent.
Subtle
Not many people noticed the subtle humour in his remarks.
A better word for subtle changes in tone is embouchure. Many or most professionals use this method when changing tone.
To be very loud and obvious, not in any way subtle.
The representation of subtle changes in light.
gentle , bareley there. a subtle hint is a very small hint. A subtle flavour is a faint flavour
subtle; not sticking out
review subtle changes in guests physical and mental state
Subtle changes in light and color in nature
depicting subtle changes in light and color.
It's meant to be ironic. Subtle means something discrete, not immediately obvious. Guns OTOH are generally very noticeable.
sorry luv--that's subtle pressure for you to "put out" as a sign of affection. not so subtle, actually.
The Impressionists are concerned with exploring subtle changes in light and color in nature.
subtile is same as subtle, as in, very delicate, tenuous and thin. however, when used as a noun like in subtilty, its meaning changes a bit from subtlety. subtilty means cunning or sly while subtlety still has the same meaning as its adjective form subtle, i.e., delicate and very thin