/biː/
[verb] To exist, to live, or to have a particular quality or position. It is the most basic verb in English, used to describe what something is, where it is, or how it feels.
'Be' is actually built from three completely different ancient verbs that were stitched together into one over thousands of years.
The verb 'be' is one of the oldest and strangest words in the English language. It does not come from a single source but is instead a patchwork — a linguistic Frankenstein — sewn together from three entirely separate Proto-Indo-European roots. This phenomenon, called 'suppletion', means that different forms of the same verb actually descend from different ancient words. When you say 'I am', 'I was', and 'I will be', you are drawing on three distinct ancestral streams that were gradually blended into one verb over millennia.
The first root is the Proto-Indo-European *es-, meaning 'to exist' or 'to be'. This ancient stem gave rise to the Old English forms 'is' (third person singular) and 'sind' or 'sindon' (plural), which survive today as 'is' and 'are'. The same root passed through Sanskrit as 'asti', through Ancient Greek as 'esti', and through Latin as 'est' — all meaning 'is'. When a Roman said 'est', an Anglo-Saxon said 'is', and you say 'is' today, you are all reaching back to the same prehistoric sound made by people who lived perhaps six thousand years ago.
The second root is Proto-Indo-European *wes-, meaning 'to dwell' or 'to remain'. This gave Old English its past tense forms 'wæs' and 'wæron', which became our modern 'was' and 'were'. The same root appears in Sanskrit as 'vasati' (he dwells) and can be found distantly echoing in the German 'war' (was). Originally, this root described something closer to physical presence — staying in a place — before it generalised into the abstract idea of past existence.
The third root, and the one that gave us the infinitive form 'be' itself, is Proto-Indo-European *bʰuH-, meaning 'to grow' or 'to become'. This root flowed into Proto-Germanic as *biju-, then into Old English as 'beon', which meant both 'to be' and 'to become'. The same root produced Latin 'fui' (I was) and 'futurus' (about to be), which came into English through Old French as 'future'. It also gave us the word 'bower' (a place where things grow), and can be spotted in the philosophical term 'being' itself. In Old English, 'beon' and 'wesan' (from the *es- root) competed as rival verbs for centuries before being merged.
The merger of these three roots into a single, unified verb happened gradually across the Old English and Middle English periods, roughly between the 5th and 14th centuries. Dialects varied — some preferred certain forms over others — but by the time of Chaucer and later Shakespeare, the modern pattern had essentially settled. What makes 'be' so irregular and unpredictable today — switching dramatically from 'am' to 'was' to 'been' — is precisely because it carries the fossilised traces of three different ancestral verbs, each with its own conjugation patterns, all compressed into one.
Philosophers and poets have always sensed something special in this word. From Shakespeare's 'To be or not to be' to the existentialists wrestling with the nature of existence, 'be' has borne an enormous weight of meaning for such a small syllable. And that weight is ancient: when Hamlet asked his question, he was unknowingly reaching back through Old English, through Proto-Germanic, through Proto-Indo-European, to a time before writing existed, when our distant ancestors first tried to find a word for the simple, astonishing fact of existing.