封
顶
About
The word "封顶" is formed by combining the character "封", meaning to seal or close, with the character "顶", meaning top or summit, creating a verb-object compound where the action of sealing is applied to the top; this literal sense of sealing the top refers specifically in construction to completing a building's roof, and by extension it denotes imposing a maximum limit or cap on something.
Word Definition - 封顶
to put a roof (on a building); to cap the roof (finishing a building project); fig. to put a ceiling (on spending, prize, ambition etc); to top off; fig. to reach the highest point (of growth, profit, interest rates); to stop growing (of plant bud or branch)