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16 personality traits and what they mean

Have you ever got muddled over the meaning of masochist, misogynist or misanthrope? Puzzled over the word perspicacious? Or wondered what on earth it means to be obstreperous?

Radio 4's All in the Mind programme explores the human mind.

We've drawn together a list of words used to describe the plethora of personalities.

1. Introvert

An introvert is shy and reticent. They steer clear of social situations where possible, preferring to spend time on their own. An introverted person is more inclined to focus on their own thoughts and feelings rather than look outwards.

2. Extrovert

In contrast, if you are an extrovert you are outgoing and confident in sociable situations. You are often the life and soul of the party; the one that offers to do that big presentation at work; the person who holds court at the dinner table and the first to grab the mic at a karaoke night.

3. Narcissistic

If you can’t tear yourself away from the mirror, and have an excessive interest in and admiration of your own physical appearance, then you could be described as narcissistic. The term originates from Greek mythology, where the young Narcissus fell in love with his own image reflected in a pool of water.

4. Altruistic

Desperate to help others, without worrying about the impact on yourself? You’re being altruistic. Being altruistic is the opposite of selfish; it’s having a selfless concern for the wellbeing of others.

5. Misanthropic

If you are misanthropic, you’re not a fan of other people. In fact you have and display an active dislike of your fellow human. Charles Dickens’s miserly character Scrooge is a famous misanthrope. Bah humbug!

The word 'narcissistic' originates from Greek mythology, where the young Narcissus fell in love with his own image reflected in a pool of water.

6. Sadistic

A sadist derives pleasure from inflicting pain, suffering, or humiliation on others. We might describe a brutal killer as sadistic.

7. Masochistic

A masochist will take pleasure in pain and their own suffering, or at least seem to. You might describe a friend who chooses to run ultra marathons as a masochist!

8. Misogynistic

The “me too” movement has propelled this word into the foreground. If you are misogynistic then, quite simply, you dislike, despise, or are strongly prejudiced against women.

9. Phlegmatic

A phlegmatic person doesn’t get emotional or excited about things easily. They keep calm in dangerous or frightening situations. The word has evolved from the Ancient Greek physician Hippocrates’s theory of the Four Humors. He believed that the mood of a person was governed by the balance of four different fluids in the body, each one associated with a different temperament. Lots of phlegm led to a calm and reasonable disposition!

10. Melancholic

This is another of Hippocrates’s four temperaments – one that he thought was governed by “black bile”! Although modern science may have thrown that out of the window, the meaning associated with the adjective still stands. A melancholic person feels or expresses a pensive sadness.

Ancient Greek physician Hippocrates believed that the mood of a person was governed by the balance of four different fluids in the body, each one associated with a different temperament. His Four Humors stated that lots of phlegm led to a calm and reasonable disposition!

11. Jocose

Jocose is an adjective that's used to describe someone who's in a good mood. If you are jocose you are cheerful, humorous and up for a laugh.

12. Obstreperous

If you are obstreperous you are refusing to behave in a reasonable way and probably protesting loudly. You are noisy and difficult to control. A teacher might describe a particularly unruly child as obstreperous.

13. Perspicacious

Are you quick at noticing, understanding, or judging things accurately? Then you are perspicacious. You are able to determine, speedily, what people and situations are really like. (A useful quality when you’re embarking on lots of online dating.)

14. Indefatigable

This describes someone who remains determined and energetic in trying to achieve something – and who is never willing to admit defeat. They never get tired of the task at hand.

15. Neurotic

This is a word we use to describe someone who gets frightened and worried about things that we might consider unimportant.

16. Irascible

If you are easily provoked, and become angry at the flick of a switch, then you could be described as irascible. It means you are quick-tempered, tetchy or touchy.

In All in the Mind, Claudia Hammond visits a specialist clinic in South London where she learns what it's like to live with a diagnosis of Borderline Personality Disorder.

For more information on personality disorders, help and advice, visit .