"somewhat stubborn" is a correct and usable phrase in written English.
You can use it to describe someone who is not completely stubborn, but still has a tendency to be stubborn. It conveys a sense of mild stubbornness rather than extreme stubbornness. Example: Samantha was somewhat stubborn when it came to trying new foods. She was open to trying new dishes, but still clung to her favorite dishes and refused to try anything too out of her comfort zone.
Somewhat stubborn in his settled ways, always present, always helpful, always kind.
He then prevailed upon a somewhat stubborn Mr Bonderman whom he had never met before to match his offer.
There may be something in that, but many observers believe it has simply been a matter of the sprightly Martial finally persuading a somewhat stubborn manager that it does not make sense to have Rooney as first point of attack any more.
He was a fascinating man, somewhat stubborn, authentic, averse to embellishment and honest; as a person as well as in his work.
It's hard to remember when I made THE decision to transition because it felt more like a lot of small decisions based on unraveling the somewhat stubborn notion that I couldn't hurt my family and thus couldn't do anything about the discomfort I felt inside.
Pseudomonas aeruginosa is only somewhat more stubborn than such other institutional pathogens as Staphylococcus aureus and the many Salmonellae.
In all three films, Mr. Sheen plays a fast-moving, clever, insecure man whose momentum is stalled by a stubborn, somewhat enigmatic older figure.
Born in Nottingham, Richardson was the son of a local provision merchant, and inherited from his mother a strong, stubborn, somewhat austere personality.
It was wise of his team to keep faith in the stubborn, somewhat attention-shy artist: his second album is full of crisply constructed, melancholic falsetto funk; a fresh new chapter in the evolution of nu-soul.
Remember that dog people can be somewhat selfish, terribly stubborn, and eccentric.
Played by Jochum ten Haaf, a Dutch actor who was also in the London production, the 20-year-old van Gogh is a brash, somewhat hot-headed and stubborn young man who has barely begun to sketch and is also deeply lonely and at loose ends about his life.
