/ˈəʊvə(r) ||; ˈovɚ/prefix (used in nouns, verbs, adjectives and adverbs 用于构成名词、动词、形容词及副词)
1 more than usual; too much 过多；过分: oversleep/overeat 睡得过久；吃得过多overcrowded/overexcited 拥挤不堪；过分激动
2 completely 完全: overjoyed 欣喜若狂
3 upper; outer; extra 上面；外面；额外: overcoat 大衣overtime 加班
4 over; above 在上方: overcast 遮蔽overhang 悬于…之上