IPA: /ˈtoʊtəlaɪz/
KK: /ˈtoʊtəlˌaɪz/
To add up or sum all parts to find the overall amount or total.
The accountant will totalise all the expenses for the month.
Past: totalised
Past Participle: totalised
Totalise → It is formed from "total" (from Latin *totalis*, meaning whole or complete) and "-ise" (a suffix used to form verbs indicating to make or to become). The word "totalise" means to make something whole or to sum it up completely.
Think of making something 'whole' ('total') — that's why totalise means to sum everything up.