Forbearance, n.
The act of forbearing or waiting; the exercise of patience. He soon shall findForbearance no acquittance ere day end. Milton.
2. The quality of being forbearing; indulgence toward offenders or enemies; long-suffering. Have a continent forbearance, till the speed of his rage goeShak.
Syn. -- Abstinence; refraining; lenity; mildness.
Shades of meaning
Fernald has no entry of its own for forbearance; he lists it under mercy, pardon, patience.
Where he writes about it:
As regards our relations to our fellow men, forbearance is abstaining from retaliation or revenge; patience is keeping kindliness of heart under vexatious conduct; long-suffering is continued patience. — from patience