verb
bluster
BLUS-ter/ˈblʌstər/
To speak loudly and aggressively with little real force.
The manager begins to bluster while his coworkers ignore him.

Etymology
Violent blowing and angry shouting led to loud aggressive speech with little force.
To speak loudly and aggressively with little real force.
The manager begins to bluster while his coworkers ignore him.

Violent blowing and angry shouting led to loud aggressive speech with little force.