Incapable of being spoken or uttered; that may not be spoken.
That may not be uttered or spoken.
That cannot or should not be mentioned (at all or by name).
poetic. Incapable of expression in or by speech.
Incapable of being discussed.
= indiscussible, adj.
英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。