Etymology
Advertisement

unclear (adj.)

c. 1300, "not easy to understand," from un- (1) "not" + clear (adj.). Similar formation in Middle Dutch onclaer, Dutch onklaar, German unklar, Old Norse uklarr, Danish uklar, Swedish oklar. Of persons, in sense of "uncertain, doubtful," it is recorded from 1670s.

Advertisement
Advertisement
Definitions of unclear

unclear (adj.)
not clear to the mind;
the reason for their actions is unclear to this day
the law itself was unclear on that point
unclear (adj.)
not easily deciphered;
From wordnet.princeton.edu