/kæst/
[verb] To throw something with force in a particular direction, or to choose actors for a film, play, or show. The word also describes the act of sending light, shadow, or doubt onto something.
A Viking word for throwing has ended up choosing Hollywood's biggest stars.
The word 'cast' arrived in English in the 13th century, carried across the North Sea by Old Norse speakers. The Old Norse word 'kasta' meant simply 'to throw' — a direct, physical action, the kind of word that belongs to people who threw fishing nets and anchor ropes for a living. Before Old Norse brought 'cast' ashore, Old English speakers used the word 'weorpan' for the same idea, a word that has since vanished almost entirely from the language. 'Cast' won the competition, and 'weorpan' quietly disappeared.
The Old Norse 'kasta' itself likely traces back to Proto-Germanic roots connected to ideas of violent or forceful motion, though the trail grows faint beyond that point. What is remarkable is how cleanly the word entered Middle English — spelled 'casten' in early texts — and how quickly it spread beyond its literal meaning. By the 14th century, English writers were already using it in extended senses: to cast doubt, to cast a shadow, to cast a glance. The physical act of throwing was becoming a metaphor for sending anything outward from oneself.
The fishing and sailing worlds gave 'cast' some of its most enduring uses. To cast a net is one of the oldest figurative images in English literature, appearing in biblical translations and religious writing throughout the medieval period. A 'cast' of a fishing line, the measured throw that sends the hook into the water, kept the word's original Norse energy alive in practical, daily life even as poets and philosophers were borrowing it for grander purposes. Sailors spoke of 'casting off' ropes — releasing the ship from the dock — a phrase so natural it has survived entirely intact into modern English.
By the 16th and 17th centuries, 'cast' had developed a remarkable new meaning in the world of theatre. To 'cast' a play meant to assign roles to actors — essentially to 'throw' each performer into their part. This theatrical usage appeared in English as organised, professional drama grew in importance, particularly during the Elizabethan era when Shakespeare and his contemporaries were building the foundations of modern theatre. The idea was that a director 'throws' an actor into a role, fitting the physical metaphor neatly onto a creative act.
The word also developed a noun life of extraordinary range. A 'cast' can be the set of actors in a production, the hard plaster shell put around a broken bone, the slightly greenish tint in a person's eye, or the shape left behind when molten metal is poured into a mould and hardens. That last meaning — the casting of metal — connects to the original sense beautifully: liquid metal is 'thrown' or 'poured' into a form, just as a Norse fisherman threw his net into the sea. Across seven centuries, the word has never truly left its origins. Every time a director casts a film or an angler casts a line, that Old Norse throwing motion is still echoing through the action.