c. 1300, "mountain, peak, promontory," from Old French pinacle "top, gable" (13c.) and directly from Late Latin pinnaculum "peak, pinnacle, gable," extended form (via diminutive suffix, but not necessarily implying smallness) of Latin pinna "peak, point," (see pin (n.1)). Figurative use is attested from c. 1400.
实用例句
1. John Major has reached the pinnacle of British politics.
约翰·梅杰已攀上了英国政界的顶峰。
来自柯林斯例句
2. Even among seasoned mountaineers Pinnacle Ridge is considered quite a tough proposition.