What is often returned but never borrowed?

Answer: Thanks.

More Classic Riddles with answers

More Classic Riddles

What is something you don't own but you can give it to anyone you meet? You only have one, but you can give it away as many times as you want without losing it. What is it?
What is that which every one can divide, but no one can see where it has been divided?
What is that which has many leaves, but no stem?
What is that which is invisible, but never out of sight?
What is that which is less tired the longer it runs?
What is that which the dead and living do at the same time?
What is that which, supposing it's greatest breadth to be four inches, length nine inches, and depth three inches and contains a solid foot?
What is the best key to a good dinner?
What is the end of everything?
What is the longest and yet the shortest thing in the world; the swiftest and yet the slowest; the most divisible and the most extended; the least valued and the most regretted; without which nothing can be done; which devours every thing, however small, and yet gives life and spirits to every object, however great?
What is the shape of a kiss?
What kin is that child to it's father who is not it's father's own son?