Correct spelling for the English word "smoothe" is [smˈuːð], [smˈuːð], [s_m_ˈuː_ð] (IPA phonetic alphabet).
There seems to be a typo in the word you provided, as "smoothe" should be spelled as "smooth." Below is a dictionary definition of the word "smooth."
Smooth is an adjective that is commonly used to describe a surface or texture that is even, flat, and lacking any roughness or irregularities. When an object is smooth, it appears sleek, polished, and has a regular consistency that is pleasant to the touch. The absence of bumps, ridges, or sharp edges contributes to the characteristic of smoothness. Additionally, the term is often used metaphorically to describe actions, movements, or processes that are effortless, flowing, and lacking any abruptness or interruption. It suggests a seamless and harmonious quality, whether referring to a person's demeanor, communication, or problem-solving abilities. Smooth can also connote a coolness or calmness of behavior, where an individual displays composure, suavity, and a polished social grace. In the context of music, smooth can describe a melodic and soothing quality, characterized by a flowing rhythm or harmony that creates a pleasant and relaxing auditory experience. Overall, smooth encompasses the concept of sleekness, consistency, and delightful simplicity in a wide range of contexts, both physical and metaphorical.
The word "smoothe" is derived from the Middle English word "smothen", which can be traced back to the Old English word "smothian". The Old English term was based on the Proto-Germanic word "smothijaną". Ultimately, it can be linked to the Proto-Indo-European root word *smē-, meaning "to launder, wash" or "to rub, smear". Over time, the spelling of "smothen" transformed to "smooth" and "smothe", as we know it today.