What does "blunt instrument" mean?

An object lacking sharp surfaces, especially as used to cause injury.

What is a synonym for "blunt instrument"?

Common synonyms include: blunt.

noun

noun ·Rare ·Advanced level

Noun

1
An object lacking sharp surfaces, especially as used to cause injury. literally
"One deep wound had been inflicted upon the temple, apparently with some blunt instrument, which had penetrated the brain."
2
A thing, person, method, or resource which is not sufficiently precise or not sufficiently effective for its intended role or use. figuratively
"The analyst is in a sense a blunt instrument, but he can work as somebody who cares, and I think a good analyst makes the patient feel that he has value."

"One deep wound had been inflicted upon the temple, apparently with some blunt instrument, which had penetrated the brain."