The slaves were 'ruthlessly' abused by their owners.
The journalist was 'ruthless' in his criticism.
a 'ruthless' killer
(..) No. BARNES: Watch him. SARAH : I told you everything I know, John. Skynet is ruthless and unpredictable. They will use the best part of you against yourself. And they will have methods I can't imagine or predict... (..)2009 Terminator Salvation