Sounds of Human Language

ch’ /č’/ —— […] You should produce a sound like a squirrel scolding someone.

q’ /q’/ —— Imitate the sound of liquid flowing out of a bottle. […]

y /y, y̥/ […] —— Devoices word-finally like the German ch in ich, or like an angry cat hissing.

R. McKenna Brown, Judith M. Maxwell, Walter A. Little,
¿La ütz awäch? Introduction to Kaqchikel Maya Language