打(う)ちのめすto knock down, to beat (someone) up, , to injure (someone) so badly they cannot recover (esp. emotionally), to overwhelm (with mental anguish, etc.)

Verbe godan en 'su', Verbe transitif

1. 1.

   EN to knock (someone) down, to floor, to beat up

2. 2.

   EN to deal a devastating blow (from which one cannot recover), to devastate (emotionally), to crush, to overwhelm, to defeat resoundingly, to give (an opponent) a drubbing