When it comes to expressing oneself clearly and effectively, speaking inarticulately is anything but ideal. Fortunately, the English language has a variety of synonyms to describe this unfortunate habit. Some great alternatives to "speak inarticulately" include mutter, mumble, stutter, garble, slur, and babble. Each of these words can be used in different contexts, depending on the severity, cause, or style of the speaker's inarticulacy. So whether you're describing your friend who always speaks in mumbles or criticizing a politician who seems to babble on without any real substance, these synonyms can add depth and nuance to your descriptions.