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.
例文
1. John Major has reached the pinnacle of British politics.
ジョン?メイジャーが英国政界の頂点に立った。
2.Even among seasoned mountaineers Pinnacle Ridge is considered quite a tough proposition.