indiscernible /ˌɪndɪˈsɚnəbəl/ adjective /ˌɪndɪˈsɚnəbəl/
adjective
Learner's definition of INDISCERNIBLE
[more indiscernible; most indiscernible] formal
: impossible to see, hear, or know clearly看不真切的；听不清楚的；弄不明白的 -
Hidden under vines and moss, the crumbling wall was almost indiscernible.在藤蔓和苔藓的遮掩下，几乎看不到那堵危墙。
-
a change made for indiscernible reasons原因不明的改变