The Collaborative International Dictionary
Coltish \Colt"ish\, a. Like a colt; wanton; frisky.
He was all coltish, full of ragery.
--Chaucer.
-- Colt"ish*ly, adv. -- Colt"ish*ness, n.
Wiktionary
n. The state or condition of being coltish.
Usage examples of "coltishness".
More soubrette than heroine, she was in that brief desirable moment between coltishness and zaftig.
The seasons rolled by, and Beldaran and I grew into an awkward coltishness - all legs and elbows.
She knew only too well that her own appearance was rescued from hopeless, oversized coltishness only by Lady Merissa's skill with cosmetics, hairdressing, and wardrobe.
In a few seasons he straitened the coltishness with admonitions, faded the pink and gold with preaching, and produced a sad, grey wraith of wifehood who died, unprotesting, a year after her second son was born.
They didn't keep track of birthdays here, but Auri was so slim, with such an endearing coltishness in her movements, that he supposed she was about fifteen.