* Formal: "Hormonal changes during menopause can often lead to a decrease in libido."
* Informal: "After a long day, all I want is a good book and a cup of tea, my libido is completely nonexistent."
* Figurative: "The new marketing campaign really ignited the company's libido for growth."
* Specific: "His high libido made him a popular figure in the dating scene."
Remember that "libido" is often used to refer to sexual desire, so it's important to be mindful of the context when using this word.