adj. stur·di·er, stur·di·est
1. Having or showing rugged physical strength or robust health: a sturdy lifeguard; a sturdy build.
2. Substantially made or built; able to withstand stress or rough use: a sturdy ladder; sturdy boots.
3. Marked by resoluteness or determination; firm: sturdy resistance.
[Middle English, fierce, valiant, disobedient, strong, from Old French estourdi, dazed, reckless, from past participle of estourdir, to stun, perhaps from Vulgar Latin *exturdīre, to be or act drunk like a thrush that has eaten fermented grapes or berries : Latin ex-, intensive pref.; see EX- + Latin turdus, thrush.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.