Prefixes:
* Semi-: This prefix means "half" or "partially" and can be used to convey "somewhat," as in "semicircle" (a shape that is partly a circle) or "semi-conscious" (partially aware).
* Sub-: This prefix means "below" or "less than," which can also imply "somewhat," as in "substandard" (below the standard) or "suboptimal" (less than optimal).
Suffixes:
* -ish: This suffix adds a sense of approximation or vagueness, often implying "somewhat," as in "reddish" (somewhat red), "tallish" (somewhat tall), or "youngish" (somewhat young).
* -ly: This suffix is often used to create adverbs from adjectives, and can sometimes convey "somewhat" depending on the adjective, as in "slightly" (somewhat small), "moderately" (somewhat moderate), or "partially" (somewhat partial).
Other options:
* Rather: This word is often used to express a degree of something, which can imply "somewhat." For example, "It's rather cold outside" means it's somewhat cold.
* Kind of: This phrase can also express "somewhat" in informal speech. For example, "I'm kind of hungry" means I'm somewhat hungry.
The best way to convey "somewhat" is to choose the prefix, suffix, or other word that best fits the specific context and desired meaning.