1) Perverted – to change the system, process in a bad way

 To pervert the justice.

 2) Sadistic – someone who enjoy inflicting pain to others

 The judge called the crime a sadistic act.

 3) Humdrum – lacking excitement , monotonous 

 Humdrum routine work

 4) Foothold – a place where you can safely put your foot when you are climbing 

 We need to get a foothold in the soap market.

 5) Duly – in a correct and expected way

 We all duly assemble at 7.30 pm.

 6) Flinch – to make a sudden movement backward because of something painful

 She did not flinch from telling the whole truth.

 7) Upheaval – a sudden big change that usually cause trouble

 It was a time of social upheaval.

 8) Suborn – bribe

 The drug cartel suborned the local police.

 9) Sleight – skill with hand 

 Impressive sleight of hand.

 10) Tutelage – the teaching

 Under his tutelage she got interest in History.