The English verb 'accommodate' is a word whose spelling trips up more writers than almost any other in the language, and whose etymology reveals a neat stack of Latin prefixes built atop one of the most versatile roots in the Indo-European family.
The word enters English in the 1530s, borrowed from Latin 'accommodātus,' the past participle of 'accommodāre.' This Latin verb meant 'to make fit' or 'to adapt,' and it was constructed from two elements: the prefix 'ad-' (meaning 'to' or 'toward,' assimilated to 'ac-' before 'c') and 'commodāre' (to make fit or suitable). The verb 'commodāre' was itself derived from the adjective 'commodus,' meaning 'suitable,' 'convenient,' or 'proper.' And 'commodus' breaks down
The Latin noun 'modus' is one of the great workhorses of the Indo-European lexicon. It descends from PIE *med- (to measure, to take appropriate measures), a root that also gave Latin 'medērī' (to heal — originally to take measures for), 'meditārī' (to reflect on), and 'modestus' (keeping due measure, hence 'modest'). Through 'modus' and its derivatives, English inherited an enormous family of words: 'mode,' 'model,' 'modern,' 'modify,' 'modulate,' 'moderate,' 'modest,' 'commodity,' 'commodious,' and of course 'accommodate.'
When 'accommodate' first appeared in English, it carried the Latin sense of adaptation and fitness. Shakespeare used it with relish — in King Lear, the word appears in the sense of furnishing or equipping. The sense of providing lodging developed during the seventeenth century, initially as a metaphorical extension: to accommodate someone was to make them comfortable, and providing a room was the most literal way to do so. By the eighteenth century, this hospitality sense had become dominant in everyday usage, though the
The notorious spelling difficulty of 'accommodate' has a straightforward etymological explanation. The word contains two doubled consonants — 'cc' and 'mm' — because of how the Latin prefixes stack. The 'ac-' is the assimilated form of 'ad-' before 'c' (just as in 'accept,' 'acclaim,' 'accrue'), producing the double 'c.' The 'mm' comes from 'com-' meeting 'modus' in the formation of 'commodāre,' producing 'commodus' with its double 'm.' When 'ad-' was then prefixed to 'commodāre,' the result was 'accommodāre' — a word carrying
The noun 'accommodation' followed quickly, attested from the 1530s as well. In British English, 'accommodation' (often in the plural 'accommodations' in American English) became the standard term for lodging or housing. The philosophical use — 'accommodation' as a process of cognitive adjustment — was popularized by Jean Piaget in the twentieth century, bringing the word's original Latin sense of 'making fit' full circle.
Across the Romance languages, the word maintains a strong family resemblance: French 'accommoder,' Spanish 'acomodar' (with a simplified single 'c'), Italian 'accomodare' (with one 'm' in modern Italian). These variations in spelling reflect different national conventions for handling the Latin double consonants, but the core meaning — to make suitable, to adjust — remains consistent from Lisbon to Bucharest.
The Emperor Commodus, who ruled Rome from 180 to 192 CE, took his name from the same adjective 'commodus' — his parents apparently hoped he would be 'suitable' or 'fitting' for rule. History's verdict on whether he lived up to his name has been decidedly negative, but the etymological connection between a despised emperor and a commonly misspelled verb remains one of Latin's quiet ironies.