To evaluate the expression \( \sqrt{19} - 32 \):
- \( \sqrt{19} \) is an irrational number because 19 is not a perfect square.
- Subtracting 32 (which is a whole number) from an irrational number \( \sqrt{19} \) will still yield an irrational number.
Thus, the result of the expression \( \sqrt{19} - 32 \) is:
an irrational number.