To place or put underwater; to immerse completely in liquid, or to cover or hide something.
From Latin 'submergere': 'sub-' (under) plus 'mergere' (to plunge or dip). Originally literal (putting under water), extended to metaphorical senses (burying oneself in work).
When you 'submerge yourself' in work, you're using a diving term—our language treats emotional absorption like physical submersion, as if focus were a liquid we could drown in.
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