What describes letters done in a single continuous pen stroke?

Letters done in a single continuous pen stroke are best described as a single stroke. This technique refers to the creation of each letter without lifting the pen from the writing surface, allowing for smooth connections and a fluid appearance. The concept of single-stroke lettering emphasizes simplicity and efficiency in execution, which can lead to a more cohesive look in calligraphy. This method is commonly used in styles where a flowing appearance is desired, contributing to the overall aesthetics of the writing.

In contrast, options such as double stroke or multi-stroke involve additional movements with the pen, which would inherently complicate the process and alter the characteristics of the letters. Flourishes, while often embellishing letters, do not define the basic nature of how letters are formed with a single stroke; instead, they are decorative add-ons made after the primary stroke. Therefore, the essence of letters created in a single continuous movement distinctly aligns with the definition of single stroke lettering.