undumb means not dumb (in various senses). Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From un- + dumb.
adj
- Not dumb (in various senses).“Then I did a miracle on myself and came undumb.”
verb
- to make no longer dumb.“One of her earlier bosses said of her: “She gives people a chance to undumb themselves—she asks lots of questions, gives careful feedback, delegates complete tasks with careful instructions.”