have a stomach upset
作名词时表示肠胃不适，常用 a stomach upset 或 an upset stomach。
She stayed home from work because she had a stomach upset.
她因为肠胃不适没去上班。
（肠胃）不适；失调；心烦意乱；不安；混乱；干扰；扰动；翻倒；倾覆；上闭集；上集合
an unexpected victory by a person or team not expected to win
干扰或中断
Disturbance or disruption.
心烦意乱；忧虑
an unhappy and worried mental state
竞争者或候选人意外获胜
An unexpected victory of a competitor or candidate that was not favored to win.
扰乱；使不安
the act of disturbing the mind or body
翻倒
An overturn.
身体不适；紊乱
a physical condition in which there is a disturbance of normal functioning
胃部不适
An upset stomach.
上集；部分有序集的子集,若x在U且x≤y,则y在U中
An upper set; a subset (X,≤) of a partially ordered set with the property that, if x is in U and x≤y, then y is in U.
飞机的飞行姿态或速度超出设计范围,可能导致失控的危险情况
The dangerous situation where the flight attitude or airspeed of an aircraft is outside the designed bounds of operation, possibly resulting in loss of control.
支撑篮子立柱的编织行
A woven row supporting the foundation rods for the uprights of a basket.
The final match was an upset because the youngest player beat the defending champion.
决赛是个冷门，因为最年轻的选手击败了卫冕冠军。
用法提示：此处 upset 是名词，指比赛中不被看好的选手获胜的结果。
AI contextual example
Their win over the top-ranked team was one of the biggest upsets in the tournament.
她们击败排名第一的球队，是本次锦标赛最大的冷门之一。
用法提示：upsets 是 upset 的复数形式，同样表示“爆冷”的比赛结果。
AI contextual example
Nobody expected that result—it was a complete upset.
没人预料到那个结果——这完全是个冷门。
用法提示：这里 upset 作名词，意为“出人意料的结果”，前面可用 complete 修饰。
AI contextual example
作名词时表示肠胃不适，常用 a stomach upset 或 an upset stomach。
She stayed home from work because she had a stomach upset.
她因为肠胃不适没去上班。
指不被看好的一方意外取胜，常与 score、pull off 等动词搭配。
The young challenger scored a stunning upset in the final.
这位年轻的挑战者在决赛中爆冷获胜。
表示“战胜某人或某队”时，后面用 over。
The team celebrated its upset over the defending champions.
这支球队庆祝自己战胜卫冕冠军的冷门胜利。
表示“造成扰乱、打乱”时用 cause an upset。
The sudden schedule change caused an upset in the office.
日程的突然变动在办公室里引起了混乱。
最常用，语气中性，可指任何意想不到的结果；upset 更强调弱队或冷门获胜。
语气更强，侧重震惊感，常含负面意味；upset 在比赛语境中多为正面或中性的“爆冷”。
较口语/新闻用语，强调“令人目瞪口呆”；不如 surprise 正式，也不如 upset 常用。
grammar · medium
易错句子The election result was a upset for the ruling party.
正确表达The election result was an upset for the ruling party.
upset 以元音音素开头，不定冠词要用 an 而不是 a；汉语没有冠词，学习者容易忽略“冠词形式取决于后一个词的读音”这条规则。
grammar · medium
易错句子There were several upset in the tournament this year.
正确表达There were several upsets in the tournament this year.
表示“意外获胜、冷门”时 upset 是可数名词，被 several、many 等复数量词修饰时必须用复数形式 upsets；汉语名词没有单复数变化，学习者常漏掉词尾 -s。
grammar · medium
易错句子I ate too much and now I have upset stomach.
正确表达I ate too much and now I have an upset stomach.
stomach 是可数名词单数，这里泛指“胃部不适”，需要不定冠词 an 来限定；汉语说“我胃不舒服”不用冠词，学习者容易把冠词整个省掉。
义项：名词‘心烦意乱、忧虑不安’；此反义词仅与情绪状态相对，不适用‘意外获胜’或‘胃部不适’等名词义项。
义项：名词‘心烦意乱、忧虑不安’；此反义词仅与情绪状态相对，不适用‘意外获胜’或‘胃部不适’等名词义项。
义项：名词‘心烦意乱、忧虑不安’；此反义词仅与情绪状态相对，不适用‘意外获胜’或‘胃部不适’等名词义项。
义项：名词‘心烦意乱、忧虑不安’；此反义词仅与情绪状态相对，不适用‘意外获胜’或‘胃部不适’等名词义项。
胃部不适
She had an upset stomach after eating too much spicy food.
她吃了太多辣的食物后胃不舒服。
情绪不安
The sudden news caused her great emotional upset.
这突如其来的消息让她情绪非常不安。
重大冷门
The defending champion's defeat was a major upset.
卫冕冠军的失利是一个重大冷门。
制造冷门
The underdog caused an upset by winning the final.
这支黑马爆冷赢得了决赛。
遭遇冷门
The top seed suffered an upset in the first round.
一号种子在第一轮就遭遇了冷门。
前缀 up-（向上）+ 词根 set（放置）；本义为“把…翻倒”，引申为“打乱、使不安”。同前缀词：upgrade（升级）、uphold（支持）；同根词：setup（设置）、setback（挫折）。
与upset搭配构成upset stomach，指胃部不适。
胃部不适（upset stomach）常伴有恶心感。
腹部疼痛或不适常与upset stomach相关。
腹泻是胃部不适常见症状之一。
严重胃部不适可能导致呕吐。
打乱计划；把事情搞砸
The bad weather upset the applecart and forced us to cancel the outdoor event.
恶劣天气打乱了我们的计划，迫使我们取消了户外活动。
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.