The crossword solution for the term SHOW ONE'S HUMANITY is ERR. This is an abbreviation of the phrase 'to ERR is human, ' which is a proverb that means everyone makes mistakes and that it is part of being human. Showing ONE's HUMANITY is about recognizing that mistakes are part of life and being willing to forgive and accept them. It is also about understanding that everyone has flaws and being compassionate and understanding towards others.