• Webster's Revised Unabridged Dictionary
    • n Quakiness The state of being quaky; liability to quake.
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Century Dictionary and Cyclopedia
    • n quakiness The state of being quaky or shaking: as, the quakiness of a bog.
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In literature:

This is quaky ground, but I know where I am, and I am not afraid.
"Gala-days" by Gail Hamilton
Quaky about tomorrow; sermon unprepared; meant to have had afternoon to self, but quite impossible.
"Woman's Endurance" by A.D.L.
It was kind of quaky, too, I admit, going along, getting nearer and nearer all the time.
"Deep Moat Grange" by S. R. Crockett