C1: The word 99% of students mispronounce. How to Pronounce “world”

From SPEAK WELL By Jade Joddle

In today’s English pronunciation and reading lesson, you will learn how to pronounce ‘world’, which is a commonly mispronounced word. To make sure that the correct pronunciation sticks in your mind, we first have to go through a list of similar words that contain the same vowel sound as ‘world’. Notice that the words in the list have different spellings, but contain the same vowel sound. Watch the lesson video for a demonstration:

Pronunciation Practice Step One

The words in the list below all contain the /ɜː/ vowel. Watch the lesson video and repeat-after-me the pronunciation.
her → Is that her turtle?
learn → Let’s learn some new words.
bird → The early bird catches the worm. (idiom)
turn → Take a turn for the worse. (idiom)
worth → It’s worth its weight in gold. (idiom)
journey → A journey to the centre of the Earth.

Other common words containing this vowel sound:  /ɜː/ 

were, earn, early, heard, sir, virtual, girl, first, worse, word, work, further, hurt, nurse, murderer, entrepreneur, etc.