查询结果:

adj. 丰富的,大量的  

拆分: -plen-充满 + -ty名词词尾 + y变i + -ful形容词词尾,充满的  

例:
Their family has a plentiful harvest this year. 他们家今年又丰收了。 
Fruit is plentiful this year. 今年水果很多。