# that can bring down a curse on her

"that can cause a curse to come upon her" 

# Yahweh will make you into a curse ... your people to be such

"Because Yahweh curses you, other people will curse you as well, and Yahweh will show people that you are truly cursed" 

# that will be shown to your people to be such

"that he will show to your people as a curse" 

# your thigh to waste away and your abdomen to swell

"your womb to be useless and your abdomen to swell". Here the word "thigh" is a polite way of referring to the woman's womb or her private parts. Possible meanings are 1) that the woman will become unable to have children or 2) that the woman's pregnancy will end too early and the baby will die.