In "Hills Like White Elephants" by Ernest Hemingway, what are two different language devices used to develop the central idea?

Two language devices that Ernest Hemingway employs in his
short story, "Hills Like White Elephants," are symbolism and understatement. Through the
use of dialogue and the symbolism of the white hills, the reader comes to understand
that Hemingway's female character, Jig, is pregnant with a small "hill" of her own. 
But, just as a white elephant symbolizes the possession of something which a person
cannot free herself, so, too, is Jig's little "bump" something of which the man wants
her to be rid but she cannot free herself of her baby with loss.  And, since the man
does not want to keep the baby, he makes Jig feel that her pregnancy is something like a
white elephant in that it has no meaning to her man. Likewise, the arid hills seem
sterile and without life--much as her womb will be if she proceeds with the abortion
that her man wants her to have.

Understatement is employed
by Hemingway to suggest the lack of feeling demonstrated by the man as well as his
inability to perceive the operation as a life-changing event, especially for Jig. 
Indeed, his perception is  extremely myopic just as when he looks across the hills, "he
looks only at the table," suggesting that the man cannot understand Jig's feelings. 
Also, when "he looks up the tracks but could not see the train," this statement means
much more than the simple words; the man refuses to think of the future. In addition,
understatement also conveys Jig's pretense before her man that hides her real feelings. 
For instance, at the end of the narrative, when the man asks, "Do you feel better?" Jig,
who has agonized over her pregnancy and possible abortion, merely replies, "I feel
fine....There's nothing wrong with me.  I feel
fine."

Certainly, understatement is a language device that
hides the feelings of the man and Jig as they say less than they mean; conveying,
too, the great divide between the couple. Acting also as a device to convey the
conflicts of the couple is symbolism which suggests much more than is apparent.  Very
symbolic, the setting  of the white, sterile hills conveys the barrenness that Jig will
feel if she is made to give up her baby, while the fields of grain suggest nurturing
life.