IPA: /kənˈstɪtʃʊtɪvli/
KK: /kɒnˈstɪtʃʊtɪvli/
In a way that is constant or inherent, without being influenced by external factors or conditions.
The gene is expressed constitutively, meaning it is always active regardless of the environment.
Constitutively → It is formed from "constitut-" (from Latin "constituere", meaning to set up or establish) and "-ively" (a suffix forming adverbs indicating a manner). The word "constitutively" means in a manner that establishes or sets up something as a fundamental or inherent characteristic.
Think of 'setting up' ('constitut-') something in a specific way ('-ively') — that's why constitutively means doing something in a way that establishes it.