high-octane
adjective
high-oc·tane ˈhī-ˈäk-ˌtān 
1
: having a high octane number and hence good antiknock properties
high-octane gasoline
2
: very powerful, strong, or effective
high-octane football
high-octane coffee
Word History
First Known Use
1931, in the meaning defined at sense 1
high-octane
adjective
as in high-test
Synonyms & Similar Words
Relevance
- high-test
- undiluted
- unmixed
- heady
- fortified
- potent
- enriched
- straight
- robust
- lusty
- full-bodied
- heavy
- full
- rich
- concentrated
- muscular
- plush
- big
- strong
Antonyms & Near Antonyms
- mild
- light
- weak
- delicate
- thin
- weakened
- thinned
- dilute
- diluted
- watery
- watered-down