11 unsolicited

unsolicited
adj
given or sent voluntarily; not asked for 主动提供或送出的; 未经请求的
    ,unsolicited `help, ad`vice, etc 主动给予的帮助、 劝告等
    ,unsolicited `comments, `criticisms, etc 未经徵求而做出的评语、 批评等
    ,unsolicited (junk) `mail, ie usu for advertising purposes 未经索要而寄来的(杂类)邮件(通常为宣传品).