architect

The root architect comes from Greek arkhitektōn, built from arkhi- ("chief, head, leader") + tektōn ("builder, carpenter, craftsman"). Tektōn is the worker who shapes wood and stone with his hands; arkhi- is the same "chief" element you see in archbishop, archenemy, and architecture. Put together, an arkhitektōn was the "chief builder" — not the laborer hauling stone, but the master who designs the whole and directs everyone else. That distinction, designer versus mere builder, is the heart of the root and survives perfectly in modern English. An architect is the professional who designs a building: she draws the plan, decides the structure, and hands it to others to construct. Architecture is what she practices — the art and science of design — and by extension the finished form a building takes, or even the underlying structure of any complex system (the architecture of a computer, of a law, of an organization). Architectural is simply the adjective: relating to that design. Notice how the "chief" idea quietly does the work in every member: the architect is the head designer, architecture is the discipline of the designing mind, and both stand above the act of physical building. This is why the word stretched so easily into the abstract. We speak of the architect of a peace deal or the architecture of a software system, because the root never really meant "one who builds with bricks" — it meant "the chief mind who designs the structure," whatever that structure is made of.