·adj Acute; piercing; searching.
II. Subtile ·adj Characterized by nicety of discrimination; discerning; delicate; refined; subtle.
III. Subtile ·adj Thin; not dense or gross; rare; as, subtile air; subtile vapor; a subtile medium.
IV. Subtile ·adj Delicately constituted or constructed; nice; fine; delicate; tenuous; finely woven.
V. Subtile ·adj Sly; artful; cunning; crafty; subtle; as, a subtile person; a subtile adversary; a subtile scheme.