IPA: /ˈrɪəlaɪz/
KK: /ˈriːəlaɪz/
To become aware of something or to understand it clearly.
I didn't realise how much time had passed while I was reading.
Past: realised
Past Participle: realised
Realise → It is formed from "re-" (meaning again) and "alis" (from Latin "res" meaning thing or matter). The word means to make something real or to bring it into existence again.
Think of making something 'real' again — 're-' means again, and 'alis' relates to things or matters.