obscure

adjective
1
not well known
ناشناخته, گمنام
synonym unknown
2
difficult to understand
مبهم, نامفهوم, گنگ
I found her lecture very obscure.
For some obscure reason, he failed to turn up.
The meaning of his comment was obscure to everyone but himself.
verb
1
to make it difficult to see, hear or understand something
مبهم کردن, پنهان کردن, گنگ کردن, نامشخص کردن, ناواضح کردن