"Subtility" is a word in ENGLISH

Drawn out with too much subtilty; overnice; as, finedrawn speculations.

Subtilty of contrivance to gain a point; artifice; stratagem.

Of or pertaining to logic; used in logic; as, logical subtilties.

A subtilty; an equivocation.

Subtilty; nicety; quibble.

A nice point; a subtilty; a debatable point.

To affect nicety or subtilty in thought or language.

That which is refined, elaborated, or polished to excess; an affected subtilty; as, refinements of logic.

One who adheres to the method or subtilties of the schools.

Hence, characterized by excessive subtilty, or needlessly minute subdivisions; pedantic; formal.

The method or subtilties of the schools of philosophy; scholastic formality; scholastic doctrines or philosophy.

One of the seminaries for teaching logic, metaphysics, and theology, which were formed in the Middle Ages, and which were …

The quality or state of being subtile; thinness; fineness; as, the subtility of air or light.

Cunning; skill; craft.

Slyness in design; artifice; guile; a cunning design or artifice; a trick; subtlety.

Refinement; extreme acuteness; subtlety.