file/initiate a lawsuit

:  a tool usually of hardened steel with cutting ridges for forming or smoothing surfaces especially of metal

:  a shrewd or crafty person

:  to rub, smooth, or cut away with or as if with a file

:  defile, corrupt

:  to arrange in order for preservation and reference

:  to place among official records as prescribed by law

:  to send (copy) to a newspaper

:  a device (such as a folder, case, or cabinet) by means of which papers are kept in order

:  roll, list

:  a collection of papers or publications usually arranged or classified

:  single file

:  any of the rows of squares that extend across a chessboard from one player's side to the other player's side

:  to march or proceed in single file

:  to cause or facilitate the beginning of :  set going

:  to induct into membership by or as if by special rites

:  to instruct in the rudiments or principles of something :  introduce

:  initiated or properly admitted (as to membership or an office)

:  instructed in some secret knowledge

:  relating to an initiate

:  a person who is undergoing or has undergone an initiation

:  a person who is instructed or adept in some special field

:  a suit in law :  a case before a court