Become harder to bear
(Other definitions for wear thin that I've seen before include "clothing advice for warm weather?" , "Begin to fail" , "Gradually dwindle" , "Gradually become less persuasive" , "Cease to convince" .)
(Other definitions for wear thin that I've seen before include "clothing advice for warm weather?" , "Begin to fail" , "Gradually dwindle" , "Gradually become less persuasive" , "Cease to convince" .)