unsolicited

US /ˌʌn.səˈlɪs.ɪ.t̬ɪd/
UK /ˌʌn.səˈlɪs.ɪ.t̬ɪd/
1.

未承諾

not asked for; given or done voluntarily.

:
•
unsolicited junk mail
:
uninvitedunsoughtunrequestedunpromptedunbiddenunwelcomegratuitousvolunteeredvoluntaryspontaneous
:
requestedinvited