/ ˌʌnəkˈnɒlɪdʒd; NAmE -ˈnɑːl-/ adjective
1.
not receiving the thanks or praise that is deserved :
Her contribution to the research went largely unacknowledged.
2.
that people do not admit as existing or true; that people are not aware of :
unacknowledged feelings
3.
not publicly or officially recognized :
the unacknowledged leader of the group