A guttural sound—such as speech, laughter, or a grunt—is formed or pronounced in the throat.

// Her friends always found her deep, guttural laugh to be highly contagious.

To chastise someone is to criticize them harshly for doing something wrong.

// The waiter was chastised for forgetting the customer’s order.

To negotiate is to discuss something formally in order to make an agreement. Negotiate can also mean, when applied to people or things in motion, "to get through, around, or over successfully."

// The parties negotiated an agreement.

// The trail is designed for an experienced skier who can negotiate unpredictable terrain.

Something described as tenacious cannot easily be stopped or pulled part; in other words, it is firm or strong. Tenacious can also describe something—such as a myth—that continues or persists for a long time, or someone who is determined to do something.

// Caleb was surprised by the crab’s tenacious grip.

// Once Linda has decided on a course of action, she can be very tenacious when it comes to seeing it through.

To snivel is to speak or act in a whining, sniffling, tearful, or weakly emotional manner. The word snivel may also be used to mean "to run at the nose," "to snuffle," or "to cry or whine with snuffling."

// She was unmoved by the millionaires sniveling about their financial problems.

// My partner sniveled into the phone, describing the frustrations of the day.

Use nonpareil to describe someone or something that is beyond compare, an absolute model of perfection of a particular thing.

Jane Austen was a writer nonpareil, and James Bond a spy nonpareil.