- She had done her duty by him
- She did well by her children
The use of preposition 'by' in the above two sentences sounds to me like it means 'because of'. I coudn't find any meaning of preposition 'by' matching with what I feel. I'm not certain that 'by' in these two sentences means 'because of' or has a close meaning or something. So...
...What is the meaning of 'by' in this situation? Please give me some more examples so that I could get a bigger picture about this case!