Used in formal contexts like job listings to indicate a preferred but not mandatory qualification or condition.
応募条件：英語力尚可。
Application requirements: English proficiency preferred.
経験者尚可。
Experience preferred.
Compound of 尚 (なお, 'furthermore, still') and 可 (か, 'permissible, acceptable'). The exact historical derivation is uncertain; the expression is used in modern formal writing.