unpremeditated
adjective uk/ˌʌn.priːˈmed.ɪ.teɪ.tɪd/ us/ˌʌn.priːˈmed.ɪ.teɪ.t̬ɪd/
（犯罪等）不是有预谋的，非事前策划的
(especially of a crime or something unpleasant) done without being planned
Opposite: premeditated
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。