I know there is this idiomatic phrase "at a loss for words", but how do you use is for something other than "words"?
"I was at a loss for what to do."
"I was at a loss of what to do."
I'm not sure if even either one is correct, though. Can you use "at a loss..." for something other than words?
Also, what is the difference between the sentences below?
"I'm lost at what to do."
"I'm lost on what to do."