trust

The English word for trust is a Viking word. This is unusual enough to be worth saying clearly: most of the words we use for the most basic relational primitives — love, faith, belief, hope — are native Old English. Trust is not. The Anglo-Saxons had words in the same semantic neighborhood — trēowth, "faithfulness"; the verb trūwian, "to believe, to have confidence"; the surviving archaism trow, "I believe so." But the noun trust in its modern form came in around 1200 from Old Norse traust, brought south by Danish and Norwegian settlement in the Danelaw, and by the late Middle English period it had displaced the native forms. The verb to trust was built later on the loan-noun. Roughly half a millennium of contact between Old English and Old Norse left this kind of layering all through the basic vocabulary; they, them, their, sky, egg, knife, give, get, take, window, law, husband, and trust are all Norse loans into a Germanic cousin that was already there.

The Old Norse word is older and stranger than the modern English one. Traust in the Norse texts is not primarily about belief. It is about support. The Old Norse-English Dictionary glosses it as "help, comfort, succour, refuge, protection, confidence, security." A man could be the traust of his lord — meaning the support, the standing-with, the place the lord could turn when he could not stand alone. A roof could be the traust of a house. The word names both the act of leaning and the thing that is leaned on. In Old Norse legal contexts traust appears in compounds for sworn alliance and oath-keeping — trausti, "a trusted man, a supporter"; traustligr, "trustworthy, firm, dependable." The semantic center is physical-metaphorical: weight transferred onto something firm enough to take it. Belief is downstream of that posture. You believe in the firm thing because you have already leaned on it and it did not give way. The cognitive sense — confidence as mental state — is a later abstraction of the bodily one.

Both the Norse traust and the native English trēowe ("true") come from the same Proto-Indo-European root, *deru- (also written *dreu-), meaning "to be firm, solid, steadfast." In Indo-European this root was simultaneously the abstract verb of firmness and the concrete noun for the firmest thing in the landscape — the tree. The two senses had not yet split. Across the daughter languages the root keeps giving the same image but rotates it through different morphology. Germanic adjective *trewwaz, "firm, faithful," gives English true. Germanic neuter noun *traustam, "firmness, that-which-is-firm," gives Old Norse traust and (through it) English trust. Germanic noun *trewwam, "the firm thing," gives English tree. The same Germanic root cluster gives truce (a peace that holds), troth (a pledged word), betroth, and — through a different sense-development — tar, the literal exudate of the standing tree. Latin took the root through a slightly different vowel and a different suffix, where *duro- gave dūrus, "hard," whence English durable, endure, during. Greek took it as the noun for "oak" — drûs — and used a related form déndron for "tree" in general, giving English druid (oak-knower), dryad (oak-nymph), dendrite (branching like a tree), rhododendron (rose-tree). Celtic took the root as the standard word for oak: Welsh derw, Irish doire. Sanskrit kept dāru, "wood." Slavic kept drĕvo, "tree." Across every branch of Indo-European, the same image: the standing tree, abstracted into the firmness of anything that can be leaned on.

What does it change to know that trust means leaning on something tree-firm? Mostly it sharpens what the word was already trying to say. Trust is not opinion. It is not the verbal endorsement of someone's character. It is the act of putting your weight on something, in advance of any guarantee that it will hold, on the basis that it has held before and is the kind of thing that holds. The substrate underneath any human practice that requires extending trust to anyone or anything — the substrate underneath the legal forms, the relational forms, the institutional forms — is this older meaning: the willingness to transfer weight to a thing that you have judged firm. Audit is what produces the judgment; trust is what the judgment authorizes. The medieval steward read the accounts aloud and the lord listened; afterward, what was left in the room was either trust (the books were heard, the numbers held) or its absence. The procedure was for the producing. The trust was the residue. And the residue is the word that came in from the Vikings, the noun the Norse gave English for what the Anglo-Saxons had been doing with their adjective-and-verb forms all along: trēowe, trūwian, the firmness and the act-of-leaning-on-firmness, drawn together into a noun by people whose other word for the firmest thing was tree.