English Reference

Word

sedative

Phoneticsseda·tive

US/ˈsɛdətɪv/

UK/sˈɛdətˌɪv/

Definition

adj. tending to make someone feel calm, relaxed, or sleepy.

adj. tending to soothe or tranquilize; describing a substance or influence that reduces functional activity.

Examples

“The doctor prescribed a mild sedative to help me sleep.”

“Before the MRI scan, the nurse administered a sedative to ensure the patient remained still during the procedure.”

“While the patient required a sedative to manage her anxiety, the medical team monitored her vital signs closely to ensure the medication did not cause excessive respiratory depression.”

Examples

simple

“The doctor prescribed a mild sedative to help me sleep.”

contextual

“Before the MRI scan, the nurse administered a sedative to ensure the patient remained still during the procedure.”

complex

“While the patient required a sedative to manage her anxiety, the medical team monitored her vital signs closely to ensure the medication did not cause excessive respiratory depression.”

Usage

Often modifies nouns like 'effect', 'quality', or 'influence'.

Real-World Examples

“For Belfort, the sedative caused time to fracture into a puddle of drool and spent willpower.”
The Guardian · 6 Sept 2026
“Relatedly, one 2025 paper notes that off-label use of sedative antihistamines is an option for managing some PMDD sleep disturbances.”
The Guardian · 14 Aug 2026

Etymology

Inherited from Middle English sedatif, from Anglo-Norman sedatif, from Medieval Latin sēdātīvus, which itself likely influenced the modern spelling.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Synonyms

calmingsoothingsoporific

Antonyms

Word family

This entry

Level
C1 · Advanced
Frequency
Occasional
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Formal

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English Reference