spend

The word 'spend' is one of those rare English words that looks thoroughly Germanic but is actually a very early borrowing from Latin.‍​‍​‍​‌​‍​‌​‍​‌​‌​‌​‌​‍​‍​‍​‍​‌​‍​‌​‍​‌​‍​‍​‍​‍​‌​‌​‍​‍​‌​‌​‌​‌ Old English 'spendan' was borrowed from Latin 'expendere' (to weigh out, to pay out), probably during the period of Roman influence in Britain or through early Christian Latin. The word was adopted so early that it underwent the same sound changes as native Germanic vocabulary, shedding its Latin prefix 'ex-' and settling into the phonological patterns of Old English.

Latin 'expendere' is a compound of 'ex-' (out) and 'pendere' (to weigh, to hang, to pay). The connection between weighing and paying is one of the most revealing in all of economic etymology. Before the invention and standardization of coinage, payments were made by weighing out quantities of precious metal — silver or gold — on a balance scale. The person paying literally weighed out their metal and surrendered it. To spend was to weigh out and give away.

This connection between weight and payment pervades Latin financial vocabulary, and through it, English. 'Expend' is a more direct borrowing of the same Latin verb. 'Expense' comes from the past participle 'expensus' (weighed out). 'Dispense' (from 'dispensare,' to weigh out in portions) originally meant to distribute measured payments. 'Compensate' (from 'compensare,' to weigh together) meant to balance one payment against another. 'Pension' (from 'pensio,' a weighing, a payment) was a regular weighed-out sum. 'Pendant' and 'pending' come from the same root in its sense of hanging — a pendant hangs from a chain, and a pending matter hangs in the balance, suspended like a weight on a scale.

The PIE root behind 'pendere' is *(s)pend- (to pull, to stretch, to spin), which also produced 'span' (a stretched distance), 'spin' (to draw out fiber), and 'spider' (the spinner). The semantic journey from stretching and spinning to weighing and paying passes through the technology of the balance scale: the pans hang (pend) from stretched cords, and the weighing determines the payment.

In Old English, 'spendan' initially meant to spend money, but it quickly extended to time and effort: to 'spend' an hour, to 'spend' one's energy, to 'spend' one's youth. This metaphorical extension treats time and energy as currencies that can be weighed out and surrendered, just like silver. The phrase 'well spent' applies to both money and time, reinforcing the conceptual parallel.

The past tense 'spent' functions as both a verb form and an adjective: a 'spent' force, a 'spent' bullet, a 'spent' fuel rod. In each case, 'spent' means exhausted, used up, emptied of its energy or value — as a purse is emptied when its contents have been weighed out and given away. A spent cartridge has fired its charge; a spent swimmer has exhausted their strength; a spent argument has run out of persuasive force.

The economic sense of 'spend' has generated an extensive modern vocabulary. 'Spending' as a noun (government spending, consumer spending) emerged in the eighteenth century with the development of economic theory. 'Spender' and 'spendthrift' (one who spends their thrift — their savings — recklessly) date to the sixteenth century. The compound 'overspend' captures the anxious relationship between spending and limit: to weigh out more than you possess, to empty the scale past zero.