What is the difference in use between 迷失， 迷路， 走失 and 迷途？
迷路 is daily used expression,it means one get lost.e.g.我迷路了，I'm lost.
迷失，迷途 are written words,formal words,both of them mean lost,but 迷失 is a verb,迷途 is a noun.
走失 is a daily and formal word,basically it means one get lost,but the reason could be either one can't find the way or being abducted or kidnapped.