indiscernible
Concise Oxford English Dictionary © 2008 Oxford University Press:
indiscernible /ˌɪndɪˈsəːnɪb(ə)l/
▶adjective impossible to see or clearly distinguish.
– derivatives
indiscernibility noun,
indiscernibly adverb.
indiscernibility noun,
indiscernibly adverb.
'indiscernible' also found in these Oxford entries:

