/heɪl/
[verb] To call out to someone in order to get their attention, or to greet someone warmly and with great praise. It can also mean to come from a particular place.
When you hail a taxi, you're using the same ancient Viking word for wishing someone good health.
The word 'hail' carries two distinct threads woven together across centuries, and tracing them reveals a remarkably human story about health, greeting, and the desire to be noticed across a crowd. The greeting sense of 'hail' begins with the Old Norse word 'heill', meaning 'healthy' or 'whole'. This word was part of the Norse toast 'heil ok sæl', literally 'healthy and happy', which Scandinavian settlers brought to Britain during the Viking Age. Old Norse 'heill' and Old English 'hæl' were cousins — both descended from the Proto-Germanic root *hailaz, meaning 'whole' or 'uninjured'. The two traditions merged naturally in the English-speaking world, reinforcing each other.
From Old Norse 'heill', the greeting form entered Middle English as 'hail', used as an exclamation of salutation. This is the same root that gave us the Middle English drinking toast 'wæs hæil' — 'be healthy' — which evolved into the festive word 'wassail', still heard at Christmas. The chain is clear: Proto-Germanic *hailaz → Old Norse heill → Middle English hail → Modern English hail. Meanwhile, the same Proto-Germanic root also fed into Old English 'hælan', meaning 'to make whole', which became Modern English 'heal', and Old English 'halig' meaning 'holy' — so 'hail', 'heal', 'whole', and even 'holy' all share the same ancient ancestor.
By the 13th century, 'hail' had become a standard form of respectful greeting in English, used not just between friends but as a formal salute to those of high status. The famous Latin greeting 'Ave, Caesar!' was often translated into English ceremonial contexts as 'Hail, Caesar!' — which showed how naturally 'hail' had taken on the weight of honour and reverence. Shakespeare used it repeatedly in this elevated sense: 'Hail to thee, Thane of Cawdor!' in Macbeth carries the full force of awe and recognition.
The sense of 'hailing' someone to get their attention — as in hailing a cab — grew organically from the greeting sense. If you hail a person, you are in effect calling out a salutation loud enough to stop them in their tracks. This practical, everyday use became common in English from the 16th century onward and remains the word's most frequent use in modern city life. The phrase 'hail from', meaning to come originally from a particular place, appeared in American English in the 19th century, likely drawn from the nautical practice of asking a ship where it 'hailed from' — its port of origin — which was itself derived from the custom of hailing, or calling out to, approaching vessels.
It is worth noting that the entirely separate word 'hail' meaning frozen rain pellets is unrelated in origin, coming from Old English 'hægl', which traces back to Proto-Germanic *haglaz and is connected to similar words in German ('Hagel') and Dutch ('hagel'). The two words have lived side by side in English for over a thousand years, identical in spelling and sound yet strangers in meaning — a reminder that language is never a tidy system, but a living, overlapping collection of human voices across time.