ROOTKIT

Etymology

Noun

rootkit (plural rootkits)

(computer security) A set of software tools used by a third party to gain unauthorized access to a computer system and control the system while concealing itself from the user.

Verb

rootkit (third-person singular simple present rootkits, present participle rootkitting, simple past and past participle rootkitted)

(transitive) To infect (a computer system) with a rootkit.

Source: Wiktionary