anonymous

1 ENTRIES FOUND:
anonymous /əˈnɑːnəməs/ adjective
anonymous
/əˈnɑːnəməs/
adjective
Britannica Dictionary definition of ANONYMOUS
1 
: not named or identified
2 
: made or done by someone unknown
3 
[more anonymous; most anonymous] : not distinct or noticeable : lacking interesting or unusual characteristics

— anonymously

adverb