unenerˈgetic,a. (un-1 7 and 5 b.) 1805A. Knox Mem. I. 6 The cold, low, unenergetic notion of it..is really below Cicero in moral matters.1850Thackeray Pendennis ii, He is a very good boy, rather idle and unenergetic.1878Seeley Stein III. 532 A man of this unenergetic character..has no colour.