un‧rec‧og‧nized also unrecognised British English
not having received praise or respect for something good you have achieved:
one of the great unrecognized jazzmen of the 1930s
not noticed or not thought to be important:
an illness that can go unrecognized for years
an unrecognized group, meeting, agreement etc is not considered to be legal or acceptable by someone in authority
doing something without people recognizing who you are:
He was able to walk down the street totally unrecognized.