ibex

n (pl unchanged or ~es 复数或不变或作ibexes) type of mountain goat with long curved horns 巨角塔尔羊（角长而曲）.

hysteria, hysteric, hysterical, hysterically, hysterics, I, I (also i), I'd, I'll, I'm, I've, I, i, i. e., I.D. card, i.e., I.Q., i/c, iambic, iambus, IBA, ibidem, ibis, IBM, ICBM, ice, ice age, ice cream, ice crevasse, ice dancing, ice hockey (US hockey), ice lolly (US Popsicle), ice-axe (also esp US ice-ax), ice-blue, ice-bound, ice-breaker, ice-cap, ice-cold, ice-cream, ice-cube, ice-fall,