An archaic or dialectal form meaning to make messy, disorder, or mess up (possibly variant of 'a-mess').
Possibly from Middle English or dialectal English combining 'a-' (prefix intensifying action) + 'mess' (from Old French, originally meaning 'food portion'). The prefix 'a-' was productive in older English.
Old English prefixes like 'a-' (as in 'amess,' 'ablaze,' 'asleep') show how English has always combined elements creatively — these forms linger in modern words like 'asleep' but feel archaic in contexts like 'amess.'
Complete word intelligence in one call. Free tier — 50 lookups/day.