Origins
The verb 'dismiss' entered English in the fifteenth century, ultimately from Latin 'dīmittere' (past participle 'dīmissus'), meaning 'to send away, to let go, to release, to forgive.' The Latin verb is a compound of 'dis-' (originally 'dī-,' meaning apart or away) and 'mittere' (to send, to let go). The literal image is of sending someone or something away from oneself — clearing the space.
The English form has an interesting morphological history. The original Latin prefix was 'dī-' (a variant of 'dis-' before certain consonants), producing 'dīmittere.' The word entered English partly through Anglo-French 'desmiss-' (the past participle stem), and the English form was subsequently reshaped to 'dismiss' under the influence of the more recognizable Latin prefix 'dis-.' This kind of re-Latinization — where an English word derived from French is remodeled to look more like its Latin ancestor — was common in the fifteenth and sixteenth centuries.
As a member of the 'mittere' family, 'dismiss' sits alongside 'admit' (send toward), 'commit' (send together), 'emit' (send out), 'omit' (send past), 'permit' (send through), 'remit' (send back), 'submit' (send under), and 'transmit' (send across). The prefix 'dis-' gives 'dismiss' the specific sense of 'sending away' — removing from presence, releasing from attention, or discharging from service.
Latin Roots
The word's semantic range in modern English covers three main areas. First, the physical sense of sending people away: 'class is dismissed,' 'the judge dismissed the jury,' 'the troops were dismissed.' This is the closest to the original Latin meaning. Second, the employment sense: 'to dismiss an employee' means to terminate their service, a euphemistic usage that frames firing as a polite 'sending away.' Third, and perhaps most commonly in everyday speech, the intellectual sense: 'to dismiss an idea' or 'to dismiss someone's concerns' means to treat them as unworthy of serious attention — to send them away from one's mental space.
The adjective 'dismissive' — meaning showing that one considers something unworthy of consideration — has become increasingly common since the mid-twentieth century. A 'dismissive tone,' a 'dismissive gesture,' a 'dismissive attitude' — the word captures a particular kind of social injury: the pain of having one's thoughts or feelings treated as insignificant. This psychological sense has made 'dismissive' a key term in relationship psychology, where 'dismissive-avoidant' describes an attachment style characterized by emotional distance and reluctance to engage.
In law, 'to dismiss a case' means to terminate it without a full trial, either because the evidence is insufficient or because of procedural defects. A 'dismissal with prejudice' means the case cannot be refiled; a 'dismissal without prejudice' allows the plaintiff to try again. The legal sense preserves the word's core meaning — sending the case away from the court — while adding precise technical distinctions.
Later History
In cricket, 'to dismiss a batsman' means to get them out by any of the recognized methods (bowled, caught, stumped, run out, lbw, etc.). This usage, dating from the eighteenth century, is distinctive to cricket: no other major sport uses 'dismiss' as its standard term for eliminating a player from active play. The word lends cricket its characteristic air of genteel understatement — a batsman is not 'eliminated' or 'killed' but politely 'dismissed,' as if being asked to leave a drawing room.
In Christian liturgy, the word has a specific technical sense. The Latin 'Ite, missa est' (Go, it is dismissed/sent) was the formula for ending the Roman Catholic Mass — and indeed, the word 'Mass' itself derives from 'missa,' the feminine past participle of 'mittere.' The congregation is 'sent' out into the world. Thus 'dismiss' and 'Mass' are, remarkably, derived from the same Latin verb.
Phonologically, 'dismiss' has the standard stress pattern for English verbs of Latin origin, with stress on the second syllable (/dɪsˈmɪs/). The 'ss' spelling reflects the Latin past participle 'dīmissus,' which entered English through the past participle stem rather than the present stem — a common pattern for 'mittere' compounds, where the '-miss-' forms (from 'missus') coexist with '-mit' forms (from 'mittere').