knocks back angel

Gathering the vectors, Accelerator launched a merciless strike straight at the chest of the
angel of water.
The sound vanished.
The seemingly weightless angel of water was knocked back three hundred meters. Like a
crashing airplane, the monster rolled spectacularly across the ground, knocking away
everything in her path.
The reason Accelerator attacked her first was very simple.
His power didn’t work on the angel of water, so he likely would not be able to
communicate with it. It was reasonable to get rid of the more troublesome one first.

- Toaru Majutsu no Index Volume 21, Chapter 8 Part 7