The journey of 'spent' begins with the Latin verb 'pendere', meaning to weigh or to pay, as money was historically weighed. With the prefix 'ex-' (out), 'expendere' meant to weigh out money, thus to pay or disburse. This term was adopted into Old English as 'spendan', losing the initial 'e-' through linguistic simplification. The past participle 'spent' evolved from this base, carrying the core idea of something that has been paid out or used up. Over time, its meaning expanded metaphorically from the depletion of resources to describe the exhaustion of physical energy or vitality, linking the literal act of disbursement to the figurative state of being drained.

The word 'spent' is the past tense and past participle form of the verb 'spend'. It originates from the Old English verb 'spendan', which was borrowed from Latin 'expendere' (to weigh out, pay out). The Latin root is composed of 'ex-' (out) and 'pendere' (to weigh, pay). In English, the form evolved to 'spend', with 'spent' as its participle.