Noun nark has 2 senses

• nark(n = noun.person) copper's nark - an informer or spy working for the police; Array
is a kind of betrayer, blabber, informer, rat, squealer
Derived form verb nark₂

• nark(n = noun.person) narc, narcotics agent - a lawman concerned with narcotics violations; Array
is a kind of law officer, lawman, peace officer

Verb nark has 2 senses

• nark(v = verb.emotion) annoy, bother, chafe, devil, get at, get to, gravel, irritate, nettle, rag, rile, vex - cause annoyance in; disturb, especially by minor irritations; "Mosquitoes buzzing in my ear really bothers me"; "It irritates me that she never closes the door after she leaves"
is one way to displease
Sample sentence:
The performance is likely to nark Sue

• nark(v = verb.communication) Array - inform or spy (for the police); Array
is one way to inform
Derived form noun nark₁
Sample sentence:
Somebody ----s