unreserved
adjective uk/ˌʌn.rɪˈzɜːvd/ us/ˌʌn.rɪˈzɝːvd/
(TOTAL)
formal无保留的;毫无疑问的;绝对的;全部的，彻底的
without any doubts or feeling uncertain; total
Critics expressed unreserved enthusiasm for the book. 书评人对此书表达了毫无保留的热忱。
(NOT SAVED)
（座位、门票等）未预留的
An unreserved seat, ticket, etc. is not being kept for a particular person to use.
I searched the pub for an unreserved table. 我在酒吧里寻找没有预留的座位。