猛然 もうぜん
mōzen

Taru Adjective
To-Adverb

1. fiercely; ferociously; furiously; resolutely

いぬ侵入 しんにゅう しゃ猛然 もうぜん えかかった。
inuga shinnyūshani mōzento hoekakatta.
The dogs barked furiously at the intruder.