​​Unfortunately, sometimes the speaker is long-winded, meaning | English as a Foreign Language

​​Unfortunately, sometimes the speaker is long-winded, meaning he or she talks too long, and the speech seems interminable – like it will never end.
If someone’s speech is slurred, it means they’re not pronouncing things clearly and it’s hard to understand. Drunk people often have slurred speech.
Some people are born with a speech impediment/impairment, meaning they naturally have problems speaking clearly, often the result of some medical issue. Often with therapy, they can learn to speak coherently/intelligibly (clearly/understandably).