uncomplainingadjective
uk/ˌʌn.kəmˈpleɪ.nɪŋ/us/ˌʌn.kəmˈpleɪ.nɪŋ/approvingwilling to do boring or difficult work without complaining or becoming angry:
The work is boring, but he's always cheerful and uncomplaining.
Thesaurus: synonyms and related words
Patient and uncomplaining
- dove
 - equable
 - equanimity
 - even-tempered
 - forbearing
 - have the patience of a saint idiom
 - long-suffering
 - pacific
 - patience
 - patient
 - peace-loving
 - peaceable
 - stoic
 - stoicism
 - the patience of Job idiom
 
uncomplainingly 
adverb uk/ˌʌn.kəmˈpleɪ.nɪŋ.li/us/ˌʌn.kəmˈpleɪ.nɪŋ.li/