// Это переводить не нужно это для погружения в контекст.

So, her husband in the past he had cancer and diabetes. She says. “I have seen him through cancer and diabetes.” To see someone through means you help them with. Means you stayed with them and helped them.

So, I have seen him through cancer – means I stayed with him and helped him when he had cancer. When he had cancer I did not leave. I stayed and I helped him. That’s what see him through or seen him through means. For example, I might say, my mam saw me through many diseases. When I was I child I was sick my mam saw me through those diseases. She stayed with me she took care of me she helped me, she saw me through. So, this wife saw him through cancer and diabetes. She stayed with him she helped him. Learn the whole phrase “To see someone through” Don’t worry about each word. You think O I don’t understand. Remember the whole phrase. The three words together.