隐含 (yǐn hán): to contain in a concealed form; to keep covered up; implicit

Although his tone was polite, his words contained a hint of dissatisfaction, and everyone felt a bit uneasy hearing it.

This contract contains many clauses that are unfavorable to Party B; before signing, you must have a lawyer look at it carefully.

On the surface, this poem describes spring scenery, but actually it contains the poet's deep longing for his hometown.

Behind his smile lies years of unknown hardship and perseverance, which only his family knows best.

This seemingly simple math problem actually implies a very complex logical relationship that requires careful reasoning to discover.