tea leaves
Casual, everyday word for dried tea leaves, especially for brewing green tea. The お is a polite prefix, and っ葉 is a colloquial suffix for leaves.
Put tea leaves into the teapot and pour hot water.
These tea leaves have a nice aroma, don't they?
Combination of the polite prefix お, 茶 (tea), and the colloquial suffix っ葉 (leaf). The suffix っ葉 is a casual variant of 葉 (は).