IPA: /ɪˈmɛnslɪ/
KK: /ɪˈmɛnslɪ/
To a very great degree; extremely or greatly.
She was immensely grateful for the help she received.
**Immensely** → It is formed from "in-" (meaning not) and "mensus" (from the Latin "metiri", meaning to measure). The word "immensely" describes something that cannot be measured or is beyond measure, indicating a vast extent or degree.
Think of something that is 'not' ('in-') 'measured' ('mensus') — that's why immensely means something is beyond measure or very great.