My right toe struck against a submerged rock.

我的右脚趾撞到一块水面下的石头。

《柯林斯英汉双解大词典》

The boulder, rock wall. bottom toe always appear in limestone mine mid deep bench blasting because of bedding, fault, joint and cave.

石灰石矿岩层较多，断层、节理裂隙和溶洞发育，爆破容易产生大块、岩墙和根底。

youdao

The results show that the failure of dam foundation is caused mainly by the extension of dam heel crack and the expansion of shear-yield zone of the foundation rock near the dam toe.

结果表明，坝基的破坏主要表现为坝踵裂缝的延伸和坝趾附近基岩剪切屈服区的扩展。

youdao

There's even a rock in the garden Fenimore Cooper is supposed to have stubbed his toe on during a garden party in 1842.

NPR: Excerpt: The Sherwood Ring