Phil in SF quoted Shards of Honor by Lois McMaster Bujold (Vorkosigan Saga, #1)
The earth still breathed a comfortable warmth from the heat of the afternoon, and the stream purled softly in the stillness.
— Shards of Honor by Lois McMaster Bujold (Vorkosigan Saga, #1) (17%)
new vocabulary: purl
(of a stream) Flow with a swirling motion and babbling sound