Here's why:
* Interjections are primarily vocalizations: They are sounds or words that express a sudden emotion or feeling. They are often used in isolation, but they can also be combined with other words to form a sentence.
* Nonverbal communication: While interjections are primarily vocal, they can also be expressed through nonverbal means, such as facial expressions, gestures, or even physical actions. These nonverbal "interjections" can convey a wide range of emotions without any spoken words.
* Context is crucial: The effectiveness of nonverbal interjections depends entirely on the context. For example, a gasp of surprise might be understood in a specific situation, but not in a different one.
Examples:
* Vocal interjections: "Ouch!", "Wow!", "Ugh!"
* Nonverbal interjections: A surprised gasp, a sigh of relief, a head shake of disapproval.
In summary: Interjections can occur without words, but they rely heavily on context and nonverbal communication to be understood. They are often expressed through facial expressions, gestures, or other physical actions.