Possible Clues:

• That makes one footless and furious to a pronounced extent
• Pronounce the aitches
• May be carelessly dropped in the middle of nowhere
• One doesn't hear it when it's dropped
• That's pronouncedly like a criminal
• That's enough to make the snake cross to a pronounced extent
• How like a criminal - pronouncedly so
• That's enough to make a beast cross to a pronounced extent
• That's enough to make a serpent seriously annoyed, to a pronounced extent
• To be under the snake to a pronounced extent is enough to make one cross