It is a thrust, a sudden forward motion, as with a sword or a knife.
The root word of lunging is "lunge".
The word lunging is a common noun and is also a verb.
That is the correct spelling of the word "lunging" (from to lunge).
lunging
The hind legs of a tiger enable it to pounce and lunge easily.
To make a sudden thrust or pass.
After lunging at my sparring partner, I found myself off balance. I enjoy lunging angrily at unsuspecting people. It's fun to see them jump. Lunging is good exercise.
The guard dog is now lunging at me. The art of fencing requires lunging.
I was lunging in my gymnastics, volleyball, and scooer classes.
lunging
The sentence "The mailman backed away from the lunging dog" can be turned into a participial phrase as "Backing away from the lunging dog, the mailman retreated."
Walking