ungrounded
/ˌʌnˈgraʊndɪd/adjective
1
- having no basis or justification; unfounded无根据的; 没有理由的; 无基础的：
ungrounded fears.
无名的害怕。
2
- not electrically earthed未接地的。
3
- predic.
ungrounded in
not properly instructed or proficient in (a subject or activity)（学科, 活动）未得到恰当指导的; 不精通的。