With this warning, the father fit the wings onto his son.
To begin with, what does "With" refer to in the above?
at that point; immediately after saying or doing something dramatic
His father had just warned Icarus of the dangers he could face if he flew.
One can also say, in a more general way: She was so angry, she told them she would never speak to them again, and with that, she stormed out of the room.
Second, is it also suitable to write "fix/attach/fasten the wings onto his son" instead? Thanks.[/QUOTE]
With this warning, the father fixed the wings to his son's back - "fixed the wings onto his son" is a little stilted, an unnatural way of speaking, but grammatically correct.
...attached the wings to his son's back
"onto his son/ on his son" is stilited
...fastened the wings to his son's back