vi. become unfixed. give way. be disordered变得不稳定，垮掉，混乱。
△Lr.3.4.166 (162): “His witsbegin to unsettle.”他的神志开始乱了。
unsettle[ʌnˈsetl]
v.使不安
‖ unsettled[ˈʌnˈsetld]adj.未处理的，未决定的
unsettled account 悬账，未结账
unsettled law case 悬案
unsettled market 动荡的市场
unsettled question 悬案