An undocumented way of accessing a system or software, usually used by hackers to bypass security.
"The attacker installed a backdoor to access the system at any time without being detected."
to have a role or influence in something
A true friend tells you harsh truths to your face.
to have complete control or influence over someone
to impress or amaze someone with beauty or charm
To be very close friends who share secrets.
to start doing new and independent things