wido en · ADJ
Etymology
From wide awake + -o.
Meanings
-
(UK, not-comparable, obsolete, slang) Aware of what is going on; fly, alert.
"Oh, nonsense! You don't suppose we're house-breakers, do you?" said Jack, impatiently. "No, not I," said the man; "I'm wido."
1875, Once a Week, page 136: