Both Uses of

forbearance
in
Measure for Measure

I shall crave your forbearance a little:
Scene 4.1 *

forbearance = refraining (holding back) from acting

This nor hurts him nor profits you a jot: Forbear it, therefore; give your cause to Heaven.†
Scene 4.3

forbear = refrain (hold back) from acting

Definitions:

(1) (forbearance)
patience, tolerance, or self-control

or:

refraining (holding back) from acting -- especially temporarily not collecting debt payments on a loan

The word, forbearance, is commonly used in the field of law to indicate that a legal right, claim or privilege is not being enforced.
(2) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

The form, forbears is typically a verb, but can be an alternate spelling of the noun forebears; i.e., ancestors. Note that these words put the emphasis on different syllables: for-BEARS v. FORE-bears