IPA: /ˌkɒmplɪˈmɛnteɪʃən/
KK: /ˌkɒmplɪˈmɛnteɪʃən/
The act or process of completing something by adding what is needed or required, often in a way that enhances or improves it.
The complementation of the two colors created a beautiful design.
Complementation is formed from "com-" (meaning together) and "pletere" (from Latin "plere", meaning to fill). The word refers to the act of filling something together, often in a way that completes or enhances it.
Think of things that 'fill together' — 'com-' means together, and 'plere' means to fill. This helps you remember that 'complementation' is about completing or enhancing something.