unnoticed
US
UK unnoticed adj: (not seen)
SC 没注意的 méi zhù yì de
SC 没看到的 méi zhù yì de ，méi kàn dào de
Her disappearance went unnoticed for nearly two days.
pass unnoticed vi + adj: (not be seen, noted)
SC 悄然过去 qiǎo rán guò qù
TC 悄然過去
TC 悄然過去
The events passed unnoticed, until someone wrote to the local paper about them.