Sough (verb)

1. To make a sound like the sighing or murmuring of the wind.
2. To make a soft murmuring sound.

Origin:

The word "sough" is derived from old english "súgan" meaning "to make a sound like sighing or murmuring".

Examples:

1. The wind soughed through the trees.
2. The river soughed as it flowed.
3. The fire soughed as it consumed the wood.
4. He soughed in his sleep.
5. She soughed softly as she meditated.