intransitive verb

to make a moaning or sighing sound
From “Metamorphosis” by Franz Kafka, page 7, paragraph 1.
“He was still occupied with this difficult movement, unable to pay attention to anything else, when he heard the chief clerk exclaim a lout “Oh!”, which sounded like the soughing of the wind.”
I felt silly having to reread this sentence.  Once I learned the meaning, I reread it once more, and it made me understand the visual of Gregor being judged on his appearance by the chief clerk. It made the moment a lot more dramatic. It made me almost feel bad for him.