English

Definition of thankless adjective from the Oxford Advanced Learner's Dictionary

 

thankless

 adjective
adjective
BrE BrE//ˈθæŋkləs//
 
; NAmE NAmE//ˈθæŋkləs//
 
 
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unpleasant or difficult to do and unlikely to bring you any rewards or thanks from anyone Sometimes being a mother and a housewife felt like a thankless task.
See the Oxford Advanced American Dictionary entry: thankless