I ran into a lamppost yesterday. Fortunately, I only sustained light injuries.

Which word is being utilized for its multiple meanings in the pun?

lamppost
light
sustained
injuries

The word "light" is being utilized for its multiple meanings in the pun. It is being used to describe the injuries as being not serious, and also as a descriptor for the type of lamppost that the person ran into.

The word "light" is being utilized for its multiple meanings in the pun. In the sentence, "Fortunately, I only sustained light injuries," the word "light" is used both to describe the injuries as being not severe and to refer to the source of those injuries, which is the lamppost.