The term RE is used in a variety of contexts. The word 'ABOUT' (5 letters) is used to indicate a general topic or subject, while 'CONCERNING' (10 letters) is used to refer to something specific related to the topic. 'ANENT' (5 letters) is an archaic term meaning 'CONCERNING' or 'REGARDING, ' and 'asto' (4 letters) is a shortened form of 'as to, ' which also means 'CONCERNING.' All four terms can be used to refer to something related to a particular topic or subject.