IPA: //ʌn.kəmˈpleɪ.nɪŋ//
KK: /ʌnˈkəmˌpleɪnɪŋ/
This word describes someone who does not express dissatisfaction or annoyance, even in difficult situations. They remain patient and tolerant without voicing complaints.
Despite the long hours and hard work, she remained uncomplaining and focused on her tasks.
Uncomplaining → It is formed from "un-" (meaning not) and "complaining" (from Latin "complainare", meaning to express dissatisfaction). The word "uncomplaining" means not expressing dissatisfaction or grievances.
Think of 'not' ('un-') expressing 'dissatisfaction' ('complaining') — that's why uncomplaining means not complaining.