Inarticulate is a word that describes a person's inability to express their thoughts or feelings clearly or effectively. Synonyms for inarticulate include speechless, unintelligible, incoherent, incomprehensible, uncommunicative, verbose, rambling, and garbled. Speechless refers to someone who is unable to speak due to shock or surprise. Unintelligible suggests that someone's speech is difficult or impossible to understand. Incoherent implies a lack of clarity or logic in someone's speech. Incomprehensible suggests that someone's speech is not understandable due to the use of unfamiliar language or concepts. Uncommunicative refers to someone who is unwilling or unable to share their thoughts or feelings. Verbose describes someone who uses too many words. Rambling implies that someone's speech is long-winded and unfocused. Finally, garbled suggests that someone's speech is jumbled and difficult to understand.