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take a tranquilliser
take 表示“服用”；tranquilliser 是可数名词，单数前需用 a/an。
She took a tranquilliser before the flight.
她在登机前服了一粒镇静剂。
镇静剂；安定药
先理解核心含义，再看它在真实句子里的用法。
镇静剂；安定药
a drug used to reduce stress or tension without reducing mental clarity
She took a tranquilliser before the flight.
她在登机前服了一粒镇静剂。
镇静剂；安定药
n a drug used to reduce stress or tension without reducing mental clarity
The doctor prescribed a mild tranquilliser to help her sleep.
医生开了一种温和的镇静剂来帮助她入睡。
He took a tranquilliser before the flight to calm his nerves.
他在登机前服用了一片镇静剂来平复紧张情绪。
Some people become dependent on tranquillisers if they use them for too long.
有些人如果长期使用镇静剂，就会产生依赖。
take 表示“服用”；tranquilliser 是可数名词，单数前需用 a/an。
She took a tranquilliser before the flight.
她在登机前服了一粒镇静剂。
prescribe sth for sb 表示“为某人开某药”；此处用复数泛指药物。
The doctor prescribed tranquillisers for her.
医生给她开了镇静剂。
be on 表示正在或持续服用某种药物。
He has been on tranquillisers since the panic attacks started.
自从惊恐发作开始以来，他一直在服用镇静剂。
Not this
I took tranquilliser before the flight.
Use this
I took a tranquilliser before the flight.
tranquilliser 是可数名词，单数形式前需要冠词或其他限定词；中文没有冠词，所以容易漏掉 a，加上 a 后才符合英语语法。
Not this
The doctor gave me a tranquillise.
Use this
The doctor gave me a tranquilliser.
tranquillise 是动词，tranquilliser 是名词；a 后面必须接名词，所以应把动词改为名词 tranquilliser。
Not this
I have many tranquilliser.
Use this
I have many tranquillisers.
many 后接可数名词复数；中文名词没有复数变化，所以容易漏掉 -s，tranquillisers 才是正确的复数形式。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
服用镇静剂
She had to take a tranquilliser before the flight.
她不得不服用镇静剂才能坐飞机。
开镇静剂
The doctor prescribed tranquillisers to help him sleep.
医生给他开了安定药来帮助睡眠。
温和的镇静剂
The vet used a mild tranquilliser to calm the dog.
兽医使用温和的镇静剂让狗安静下来。
麻醉飞镖
The ranger shot the rhino with a tranquilliser dart.
护林员用麻醉飞镖射击犀牛。
镇静剂过量
He died from a tranquilliser overdose.
他死于镇静剂过量。
受镇静剂影响
She was arrested for driving under the influence of tranquillisers.
她因在镇静剂作用下开车而被捕。
Use tranquilliser naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想 tranquil（平静）+ iser，像药瓶标签：吃下它，心平气和。
语域：neutral 常见场景：doctor's consultation、prescription leaflet、health news report 该词为中性表达，通常用于医疗场合或日常谈论镇静药物时，多出现在就诊、药品说明和健康报道中。
这些词都与 tranquilliser 以相同的非重读后缀 /aɪzə/ 结尾；其中 analyser、paralyser、crystalliser 与目标词还共享精确的 /laɪzə/ 收尾。注意它们都不押韵，因为主重音都在第一个音节，重读元音不同。拼写上有用的干扰项：crystalliser 与目标词都带 -lliser，动词 tranquillise 拼写极像但发音以 /laɪz/ 收尾，没有末尾的 /ə/。
Dictionary facts from ECDICT, WIKTIONARY.