More difficult to notice or understand.
This word can make people think of secrets, mysteries, or things that are hard to see.
Examples:
The music got subtler as it went on.
Her smile was subtler than his.
The colors in the painting were subtler than I thought.
The cat's plan to catch the mouse was subtler than I expected.
The rabbit's plan to escape was subtler than anyone thought.
The dog's plan to get the food was subtler than the cat's plan.