We need to constantly replenish our supply of new words in order to have enough of them to express ourselves well. One new word a day is something all language learners should try to achieve.
Seven colours make up a rainbow: Red, Orange, Yellow, Green, Blue, Indigo, and Violet. English has an idiom for nearly all these colours.
Words are made up all the time by different groups of people, but only if they are used widely over a period of time will dictionary makers put them in their reference works.
Inventing metaphors stretches the imagination! Take a list of objects and try to relate them to something completely different.
Languages change with circumstances, often unexpectedly, and we adapt to and integrate these changes into our speech and writing.
Affect and effect are two words that are easily mixed up – even native speakers of English get them confused!