unattended
adjective uk/ˌʌn.əˈten.dɪd/ us/ˌʌn.əˈten.dɪd/
无人看管的；无人照料的
not being watched or taken care of
Please do not leave your luggage unattended. 请不要丢下您的行李无人照管。
According to the report, most accidents occur when young children are left unattended in the home. 根据报告，大多数事故发生在孩子被独自留在家里的时候。