the.com/betterment

means The act of making something better than it was — improvement with a sense of lasting upgrade, not just change.

from Built from 'better,' which goes back through Old English 'betera' to a very old Germanic root tied to 'bat' meaning good — the same ancestor gives German 'besser.' English bolted on '-ment' (via French, from Latin '-mentum,' a suffix that turns verbs into nouns of result or process) to make the abstract noun: not just the state of being better, but the ongoing work of getting there. The word's legal and civic life — 'betterment' as the rise in a property's value from improvements, or a tax levied on that rise — dates to usage in property and municipal law, which is likely where it picked up its oddly financial, paperwork-scented undertone.