Key
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
A wharf for the lading and unlading of merchandise from vessels. More commonly spelled "quay." An instrument for fastening and opening a lock. This appears as an English word as early as the time of Bracton, in the phrase "cone et keye," being applied to women at a certain age, to denote the capacity of having charge of household affairs. Bract, fol.
806.
See Co.NE and Key.