形容詞 intelligible:

1. capable of being apprehended or understood
   同義詞：apprehensible, graspable, perceivable, understandable
2. well articulated or enunciated, and loud enough to be heard distinctly

1. Something intelligible or perceptible by the mind.
   客體，客觀，對象頭腦中可反映或可以感知的事物
2. The book is intelligible to anyone.
   這本書任何人都看得懂。
3. Readily comprehended or understood; intelligible.
   易懂的易于理解或明白的; 易懂的
4. His theory is not intelligible to us.
   他的理論我們無法理解。

in.tel.li.gi.ble

adj.（形容詞）
Capable of being understood:
能被理解的：
例句：
an intelligible set of directions.
一套易于理解的說明

Capable of being apprehended by the intellect alone.
只能為知識分子所領悟的

來源：
Middle English
中古英語
from Old French
源自 古法語
from Latin intellegibilis, intelligibilis
源自 拉丁語 intellegibilis, intelligibilis
from intellegere [to perceive] * see intelligent
源自 intellegere [理解] *參見 intelligent

【引伸】
intel.ligibil.ity 或
intel.ligibleness
n.（名詞）
intel.ligibly
adv.（副詞）