Modifies a noun

• testis: To date, many major pediatric surgical centers in UK use laparoscopy only to " spot the ball " in impalpable testes!

• dust: The halo that crowned our heads seared away the shades as we passed, like impalpable dust.

Modifying Another Word

• almost: Little things, almost impalpable, had happened to justify that doubt; something in his manner had belied his words.