To evaluate the expression \( \sqrt{19} - 32 \):
- The square root of \( 19 \) (i.e., \( \sqrt{19} \)) is an irrational number because \( 19 \) is not a perfect square.
- Subtracting \( 32 \) (a rational number) from an irrational number (\( \sqrt{19} \)) will result in another irrational number.
Thus, the result of the expression \( \sqrt{19} - 32 \) is:
an irrational number.