Thankless – Not appreciated
(Pronounced thank-less)
To remember the definition of the word thankless, use the following mnemonic:
He was thanked less and less (thankless) until he was never thanked.
Examples of thankless in a sentence
She did all the washing, ironing, cleaning and cooking, but no one commented - they were thankless tasks.
Being a tax inspector can be a thankless task - the public rarely appreciates you.
As a result, achieving any change in society is always an uphill and often thankless task.