thank you
Word family
- thanksexclamationA1
- thankfuladjectiveB2
- thankfullyadverbB2
- thanksgivingnounB2
- thanklessadjectiveC1
Synonym discussion
Sense: noun/1
All four words relate to showing you value what someone has done, but they differ in warmth and formality. 'Thank you' and 'thanks' are the everyday terms — 'thank you' is slightly more polite, while 'thanks' feels quicker and more casual ('Thanks for the lift!'). 'Gratitude' refers to the deep feeling itself rather than the act of expressing it; you might feel gratitude for years without ever saying anything. 'Appreciation' stresses recognising the worth of someone's effort — a boss might show appreciation with a bonus, not necessarily with words. 'Acknowledgement' is the most formal and can be cold: a company might send an acknowledgement of a complaint without any real warmth. If you want to sound human and warm, stick with 'thank you' or 'thanks'; use 'gratitude' and 'appreciation' when describing the feeling in more serious contexts.
Common collocations
Etymology
The word 'thank' comes from Old English 'þancian' (to give thanks), which is related to the noun 'þanc' (thought, gratitude). The two-word phrase 'thank you' emerged as a polite formula in English by the 15th century, gradually shortening from longer expressions like 'I thank you'. The sarcastic use (sense 4 of the exclamation) developed much later as an ironic twist on the formula.