intelligible
adj. 可理解的，明白易懂的；只能凭智力理解的
例句
His lecture was readily intelligible to all the students.
他的讲课学生们都能轻松地听懂。
《牛津词典》
The language of Darwin was intelligible to experts and non-experts alike.
达尔文的语言对专家和平常人来说都容易理解。
《柯林斯英汉双解大词典》
Will it split into varieties that become less mutually intelligible?
它会分裂成不同的变种，变得不易相互理解吗？
