grit
noun
abrasive particles or granules, as of sand or other small, coarse impurities found in the air, food, water, etc.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
We see these victims everywhere shorn of power—weak, nerveless, backboneless, staminaless, gritless people, without forcefulness, mere nonentities because they have ceased working.
From Pushing to the Front by Orison Swett Marden