unpremeditated
词根词缀：
meditate v. 思考
medit 思考 + ate 做，造成，使… → 思考
meditation n. 沉思，冥想；默念
medit 思考 + ation 行为，过程，状态，结果 → 沉思，冥想；默念
meditative adj. 沉思的；善于思考的
medit 思考 + ative 有…倾向（性质）的，属于…的 → 沉思的；善于思考的
premeditate v. 预先思考
pre 预先 + meditate 思考 → 预先思考
premeditated adj. 预谋的，事先计划的
premeditate 预先思考 + d → 预谋的，事先计划的
unpremeditated adj. 非预谋的
un 非 + premediated 预谋的 → 非预谋的
数据来源：新东方英语词汇速记大全
相关例句：
The unpremeditated fault duty is a new stipulation in "The law of contract of People's Republic of China".
阐述了缔约过失责任的概念、特征、主要表现形式、与违约责任的区别，及《合同法》这一项新规定在建筑活动中的重要意义。
As a kind of typical professional unpremeditated crime, like traffic accident and other professional accidents, crime of medical accident occurs frequently in our daily lives.
医疗事故罪作为一种典型的业务过失犯罪，与交通事故等相关的业务活动中的事故一样，已成为人们日常生活中经常发生的事。
The Exploration on Unpremeditated Fault Duty of Concluding a Treaty on Construction
建筑活动中缔约过失责任的探讨
Those who have infringed on human rights due to unpremeditated crime in medical service should be held responsible for relevant crime laws, Hospitals and doctors undertake to provide the patients and their families with all the true information of treatment and to ask them for promise.
医疗服务过失构成特殊侵权的，应当承担相应的民事法律责任；医院和医生负有向患者及其家属提供治疗的全部、真实信息和征求患者与家属作出同意承诺的义务；
Love certainly is the authentic experience built on the perception of soul, such as unpremeditated lost.
爱，一定是建立在灵魂体味上可信的经验，比如毫无准备的痛失。
There was fire in her and throughout her; she seemed the unpremeditated offshoot of a passionate moment.
她浑身上下有一团火，向四下发散着，象是在激情时刻不期而孕的一个子嗣。