somniferous
adjective
som·nif·er·ous säm-ˈni-f(ə-)rəs 
: soporific
Synonyms
- drowsy
- hypnotic
- narcotic
- opiate
- sleepy
- slumberous
- slumbrous
- somnolent
- soporific
See all Synonyms & Antonyms 
Example Sentences
a somniferous enumeration of details that I could have done without
Recent Examples on the Web Everyone was back in the Dolby Theatre, a welcome return after last year’s somniferous experiment from Steven Soderbergh, which was held in Los Angeles’s Union Station. 
Washington Post, 9 Mar. 2022
Washington Post, 9 Mar. 2022 Word History
Etymology
Latin somnifer somniferous, from somnus + -fer -ferous
First Known Use
1602, in the meaning defined above
Medical Definition
somniferous
adjective
som·nif·er·ous säm-ˈnif-(ə-)rəs
: soporific
somniferous
adjective
as in hypnotic
tending to cause sleep a somniferous enumeration of details that I could have done without Synonyms & Similar Words
Relevance
- hypnotic
- soporific
- narcotic
- somnolent
- soothing
- drowsy
- slumberous
- opiate
- sleepy
- slumbrous
- quieting
- hypnotizing
- sedative
- dulling
- depressant
- relaxant
- comforting
- tranquillizing
- tranquilizing
- relaxing
- calming
- benumbing
- restful
- analgesic
- lulling
- numbing
- anesthetic
- deadening
- settling
- stupefying
- pacifying
- anesthetizing
- mesmerizing
Antonyms & Near Antonyms
- stimulant
- stimulating
- rousing
- arousing
- waking
- energizing
- refreshing
- restorative
- stimulatory
- stimulative
- bracing
- invigorating
- awakening
- reviving
- wakening