To immerse something is to completely cover it with liquid. More figuratively, to immerse yourself in an activity is to give it your full attention and involvement.
From Latin "immergere" meaning "to plunge into," from "in-" (in) and "mergere" (to dip or sink). The figurative sense of deep mental involvement developed later.
Immersion is powerful because your brain loves coherent worlds—when everything around you points to the same activity, you learn and adapt faster. That’s why language immersion, focused practice, or even getting "lost" in a hobby can feel so transformative.
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