Upper-Intermediate (B2)
IPA: /ɪnˈfɜrnəli/
KK: /ɪnˈfɜrnəli/
Definition
In a way that is extremely unpleasant or hellish.
Example
The heat was infernally intense during the summer.
Conversation

I can't believe how hot it is today; it feels infernally stuffy outside.

I know, right? I stepped outside for a minute and started sweating immediately.

This weather is infernally uncomfortable for sure.

Let's just stay indoors and enjoy some ice cream instead!
Synonyms & Antonyms
Synonyms
hellishly
diabolically
devilishly
Antonyms
heavenly
blissfully
joyfully
Root Explanation
Infernally → It is formed from "infernal" (from Latin "infernum", meaning hell or the underworld) and the suffix "-ly" (meaning in a manner of). The word "infernally" means in a manner relating to hell or the underworld.
Memory Tip
Think of 'infernal' relating to hell, and remember that 'infernally' means behaving in a way that is hellish or related to the underworld.
Visually Confused Words
internally
interally
infrarenally
integrally
informally