How to use "thankless" in sentences with meaning in English and Hindi

Example sentences for "thankless" in popular movie and book plots

Walking into a local establishment's drinking area, Adams sees Sam at the bar and tells him that training raw recruits is a thankless task. - The Colter Craven Story
Throughout the film he's portrayed as a diligent worker, doing thankless tasks and accepting criticism stoically. - The Journals of Musan
Detective Inspector Jack Frost has been assigned with the thankless task of investigating them. - A Touch of Frost (novel)

Meaning of "thankless" in English

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Meaning of "thankless" in Hindi

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