rootkit

rootkit [root-kit, roo t‐]Computers. Word Origin noun

1. malicious software that allows an unauthorized user to maintain access to a computer by concealing programs and processes, files, or data from the operating system.

verb (used with or without object), root·kit·ted, root·kit·ting.

2. to install such software on (a computer, electronic device, etc.): I think my system has been rootkitted.

Origin of rootkit root1 (conventional name for the username or account of a UNIX administrator) + kit1 British Dictionary definitions for rootkit rootkit noun

1. computing a set of programs used to gain unauthorized access to a computer’s operating system, esp in order to destroy or alter files, attack other computers, etc