IPA: /ɪnˈtɛnsɪvli/
KK: /ɪnˈtɛnsɪvli/
In a way that involves a lot of effort, focus, or concentration.
She studied intensively for her final exams to ensure she would pass.
Intensively → It is formed from "intensivus" (from Latin, meaning to stretch or strengthen) and the suffix "-ly" (meaning in a manner of). The word "intensively" means in a manner that stretches or strengthens, often referring to a high degree of effort or focus.
Think of something being 'stretched' or 'strengthened' ('intensivus') to remember that 'intensively' means doing something with a lot of effort or focus.