forbearing

adjective

1. Enduring or capable of enduring hardship or inconvenience without complaint: long-suffering, patient, resigned. See accept/reject.
2. Not strict or severe: charitable, clement, easy, indulgent, lax, lenient, merciful, soft, tolerant. See accept/reject.

The adjective has one meaning:

Meaning #1: showing patient and unruffled self-control and restraint under adversity; slow to retaliate or express resentment
  Synonym: longanimous