A misspelling of accommodate; this non-standard form appears in some older texts but is considered incorrect in modern English.
This is a common misspelling of accommodate (from Latin accommodare). The extra 'm' appears because people often mishear or misremember the double letters in the original word.
Accommodate is the most frequently misspelled word in English business writing—people add extra 'm's or 'c's, probably because 'comma' and 'commercial' have those double letters, and our brains get confused by similar-looking words.
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