the word 'subsist' originates from the latin verb 'subsistere', which is a compound of the prefix 'sub-' (meaning "under, up from under") and 'sistere' (meaning "to take a stand, to cause to stand"). the literal sense was "to stand firm, to hold one's ground, to remain." this evolved into the late latin meaning of "to exist," carrying the notion of standing or remaining in existence. in english, it developed the specific sense of maintaining life or existence, often with an implication of doing so barely or with minimal support, reflecting the "under" or "from below" aspect of its prefix. thus, the modern meaning of managing to stay alive, especially with difficulty, logically extends from the idea of standing firm or remaining in place with underlying support.

Structure: sub (under, from below) + sist (to stand, to set) - sub: a prefix of latin origin meaning "under, below, from beneath, up from under." it indicates a position below, a secondary degree, or support from below. - sist: a combining form from latin 'sistere', meaning "to cause to stand, to place, to set, to stand firm." it is related to 'stare' (to stand).