Angular and Subtle

adjective

• Measured by an angle or by the rate of change of an angle.
  • usage: "angular momentum"
• Having angles or an angular shape.
  • synonyms: angulate

• (n.) A bone in the base of the lower jaw of many birds, reptiles, and fishes.
• (a.) Relating to an angle or to angles; having an angle or angles; forming an angle or corner; sharp-cornered; pointed; as, an angular figure.
• (a.) Fig.: Lean; lank; raw-boned; ungraceful; sharp and stiff in character; as, remarkably angular in his habits and appearance; an angular female.
• (a.) Measured by an angle; as, angular distance.

adjective

• Difficult to detect or grasp by the mind or analyze.
  • usage: "his whole attitude had undergone a subtle change"; "a subtle difference"; "that elusive thing the soul"
  • synonyms: elusive
• Able to make fine distinctions.
  • usage: "a subtle mind"
• Working or spreading in a hidden and usually injurious way.
  • usage: "glaucoma is an insidious disease"; "a subtle poison"
  • synonyms: insidious, pernicious

• (superl.) Characterized by refinement and niceness in drawing distinctions; nicely discriminating; -- said of persons; as, a subtle logician; refined; tenuous; sinuous; insinuating; hence, penetrative or pervasive; -- said of the mind; its faculties or its operations; as, a subtle intellect; a subtle imagination; a subtle process of thought; also, difficult of apprehension; elusive.
• (superl.) Sly in design; artful; cunning; insinuating; subtile; -- applied to persons; as, a subtle foe.
• (superl.) Smooth and deceptive.
• (superl.) Cunningly devised; crafty; treacherous; as, a subtle stratagem.