In ancient Egypt, the Sphinx is a male statue of a lion with the head of a human, sometimes with wings. Most sphinxes however represent a king in his appearance as the sun god.
An anacronym is an acronym or an abbreviation so old or familiar that no one remembers what its letters stand for, such as BASIC or COBOL . By the way, an acronym is not just any abbreviation. It's a word that is short for other words, usually using their initial letters.
Anonymity, adjective anonymous, is derived from the Greek word á¼Î½ÏÎ½ÏÎ¼Î¯Î±, anonymia, meaning without a name  or namelessness.In colloquial use, anonymous is used to describe situations where the acting person's name is unknown. It can be said as not using your own name, simply. Police use of anonymity is a complex issue, since the police often will want to know the identity of the tipper in order to get more information, evaluate the reliability or get the tipper as a witness.