The definition of wily is something or someone who is cunning and sly.
Tending to slip away, as from a grasp
Subtly deceitful; sly; cunning; artful
Find another word for stealthier. In this page you can discover 6 synonyms, antonyms, idiomatic expressions, and related words for stealthier, like: sneakier, wilier, slyer, slipperier, craftier and quieter.