register
Before "register" meant a band of pitch, a level of formality, or a record-book, it meant what had been carried back. Latin regerere — re- (back) + gerere (to carry). Medieval Latin regestrum was the book that held the carryings-back. The arc the word makes is the one many record-words make: act → artifact → the structure that holds many artifacts → a metaphor for any scheme of available levels.
The English register descends from Late Latin regestrum, a clerical variation of regestum, the past participle of regerere: re- (back) + gerere (to carry, to bear). To regerere is to carry back into form — to record, to copy onto the roll, to enter into the book that holds what mustn't be lost. The verb is the same one in gestation (carrying), gesture (a thing carried into the air with the hand), gerundive (the verbal noun of bearing-into-being). Gerere is not specific to records; it's the wider verb of bringing-into-form. The re- particularizes it. To regere is to bring something back across the gap of time between the act and its preservation.
By the medieval period, regestrum is no longer the verb but the artifact — the actual book sitting in the chancery or the parish, the bound roll where the regerere has settled into ink. From there, the word seeded itself outward into every domain that needed a word for "the structure that holds the available." A musical register: the band of pitch a voice can carry. A linguistic register: the level of formality available to a speaker. A cash register: a ledger-machine of sales. A vent register: an adjustable opening in a floor or wall, with detents — a discrete set of possible positions. The shape across all these uses is the same. The register is not the act, and not the contents. It is the structure that holds the possible carryings-back.
The arc the word makes is the one many record-words make as they age. The verb (carrying-back) becomes the artifact (what is carried back). The artifact becomes the structure that holds many artifacts (the book of all carryings-back). The structure becomes a metaphor for any scheme of available levels (vocal range, formality, ledger lines). Each step is a small abstraction. By the time we say a writer "modulates register" or a singer "drops to chest register," the word has done its full four-step work. The verb has fallen silent. What survives is the spatialized scheme — the levels the voice can use, the strata the writing can occupy, the rooms the ledger can fill.
- gesture — Latin gestus, "a carrying" — a thing brought into the air with the hand
- gestation — Latin gestare, "to carry" — bearing across time
- gerundive — the Latin verbal-noun form of gerere; the bearing-into-being
- ingest — in- + gerere; to carry in
- digest — dis- + gerere; to carry apart, to distribute through
- congest — con- + gerere; to bring together, to pile up
- suggest — sub- + gerere; to carry under, to bring near
- belligerent — bellum (war) + gerere; literally, war-bearing
- jest — Old French geste, "a deed, a tale of deeds"; from gerere, by way of medieval romance — the heroic deed became the tale of the deed became the joke
- registrar — agent-noun in English; the person who keeps the register
- registry — the place where the register is kept
- registered — formally entered into the record (mail, nurse, lobbyist, voter)