uncomplaining

From un- +‎ complaining.

uncomplaining (comparative more uncomplaining, superlative most uncomplaining)

1. Without complaint; patient and tolerant.
   • 1929, Sir William Marshall, Memories of Four Fronts, page 133:

     One can hardly write of Suvla without a word of admiration for that patient and uncomplaining hero the Indian drabi, not forgetting his mules.

• uncomplainingly