Preposition: for

• fish: These help to create pools and riffles for fish to spawn.

Adjective modifier

• shallow: And secondly there are the shallow riffles, which are easy to fish but rarely hold anything worth catching.

• little: I cast up a tiny little riffle and kept just going a little too far to the left.

Modifies a noun

• shuffle: The Zarrow Shuffle is the ultimate false riffle shuffle.

• section: At stream sites, five replicated one minute kick sample units will be collected from riffle sections.

Modifying Another Word

• then: You then riffle through them until they say STOP Show the card they stopped at.

Noun used with modifier

• sniper: The man in the apartment sticks a sniper riffle out the window and aims it at the phonebooth.

• gravel: Even when the mornings are still frosty in early March, dace will be found massing in the deeper water before shallow gravel riffles.