The term 'Acts Like a Quidnunc' can be broken down into two crossword solutions: PRIES (5 letters) and MEDDLES (7 letters). PRIES is a verb meaning to inquire too curiously or officiously into the private affairs of others. MEDDLES is also a verb, meaning to interfere in the affairs of others without invitation or welcome. Together, these two words describe someone who is nosy and intrusive, acting like a quidnunc.