All 3 Uses

scruples
in
Faust
(Auto-generated)

I'm cleverer, true, than those fops of teachers,
Doctors and Magisters, Scribes and Preachers;
Neither scruples nor doubts come now to smite me,
Nor Hell nor Devil can longer affright me.†
FAUST
The There my scruples naught increases.†
*
FAUST
Thou, monster, wilt nor see nor own
How this pure soul, of faith so lowly,
So loving and ineffable,—The faith alone
That her salvation is,—with scruples holy
Pines, lest she hold as lost the man she loves so well!†

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).