All 6 Uses

scruples
in
Gone with the Wind
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They were completely fearless of wild horses, shooting affrays and the indignation of their neighbors, but they had a wholesome fear of their red-haired mother's outspoken remarks and the riding crop that she did not scruple to lay across their breeches.†
Chpt 1.1 *

scruple = an ethical or moral principle that discourages certain kinds of action
She was not above selling a poor grade of lumber for the price of good lumber if she thought she would not be detected, and she had no scruples about black-guarding the other lumber dealers.†
Chpt 4.38
His inexperience, his errors, his utter lack of business judgment and his scruples about close dealing were the same as Hugh's.†
Chpt 4.41
Scarlett was in a furious temper and did not scruple to expend it on Hugh, for she had just received an order for a large amount of lumber—a rush order at that.†
Chpt 4.42

scruple = an ethical or moral principle that discourages certain kinds of action
But some people, like Ashley, have neither cunning nor strength or, having them, scruple to use them.†
Chpt 4.43
She loved him, scamp, blackguard, without scruple or honor—at least, honor as Ashley saw it.†
Chpt 5.62

Definitions:

(1) (scruples)
principles that discourage certain kinds of action
(2) (meaning too rare to warrant focus)
Much more rarely, scruple can be used as a verb meaning "hesitate on moral grounds" as in "He lied and did not even scruple about it."

Even more rarely and archaically, at one time a scruple was a measure of weight equal to 20 grains (about 1.3 grams).