Definition of "thanklessly" [thanklessly]

• In a thankless manner, ungratefully. (adverb)

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• "Folks like Charlie Braxton in Jackson, Mississippi -- a handicapped Black man who works day to day, thanklessly and often anonymously, with and for the people."
• "A repo man tracks them down but is killed by Remy, leaving Remy's former partner and childhood friend Jake (thanklessly played by Forest Whitaker), to track him and Beth down before he can find a way to remove their payments from the Union's databases."
• "I guess my seven semesters of heartlessly (and for the most part thanklessly) grading seemingly-endless piles of student papers has finally paid off!"