The phrase "somewhat inevitable" is correct and can be used in written English.
It means that something is likely or bound to happen to some extent. Example: Despite our efforts, it was somewhat inevitable that we would face challenges in completing the project on time.
Follow-up movies seem somewhat inevitable after the huge hype surrounding the first one.
The tricky situation in which Corbyn found himself was somewhat inevitable.
The other gripe is: a) slightly bigger; and b) somewhat inevitable.
Having started out as a harpsichord player, it also seemed somewhat inevitable.
Last week, EastEnders gave us the somewhat inevitable slick-haired, black-clad second coming of Nasty Nick Cotton.
With high-profile supporters in the fashion industry, from Anna Wintour to Kate Moss, a return was somewhat inevitable.
Barneys New York sensed that Brooklyn was a natural fit for the "edgy sensibility" of the Barneys Co-Op chain, and now one exists on Atlantic Avenue, looking architectural and spacious and somewhat... inevitable.
Crushed rosettes in the skirts of the metal dresses drooped somewhat, an inevitable but dispiriting occurrence.
Their success has muted somewhat the inevitable questions for McEnroe about floating Davis Cup invitations to Pete Sampras and Andre Agassi.
When I saw Ortiz next, in mid-June, he had weathered another slump (one for twenty-seven) and settled into a more sustainable cycle of boomlets and busts, befitting a man of his age and dampening somewhat the inevitable snickering that his transformation must have been chemically enabled.
The story lurches along somewhat, perhaps the inevitable result of the storytelling method, and your reactions to it follow suit.
