1. 难识别的：难溶indissolvable | 难识别的indiscernible | 难使堕落的uncorruptible
2. 察觉不出,难以分辨的：Exorbitant 过高,过度,过分(的) | Indiscernible 察觉不出,难以分辨的 | Cumulative 累积的,加重的(法律)
3. 观察不到的：invisible 看不到的 | indiscernible 观察不到的 | minute 微小的
4. indiscernible的反义词
4. 分辨不清的：gullible 易受骗的 | indiscernible 分辨不清的 | foible 小缺点,小毛病
adj
1. difficult or impossible to perceive or discern
e.g. an indiscernible increase in temperature
2. barely able to be perceived
e.g. the transition was almost indiscernible
an almost insensible change
Synonym: insensibleundetectable