0 past simple and past participle of suck
1 to pull in liquid or air through your mouth without using your teeth, or to move the tongue and muscles of the mouth around something inside your mouth, often in order to dissolve it:
2 If someone or something sucks, that person or thing is bad or unpleasant:
People often suck a peppermint as a breath freshener.
But there will not usually be other complex components as components get 'sucked into' the dominant component before becoming complex.
People find themselves 'sucked into an argument' - 'we can't talk with each other; we talk to each other'.
The patient explained that he had felt restlessness in the mouth and chewed gum and sucked candies to relieve this sense of inner restlessness.