noun which may take the genitive case particle 'no', na-adjective, noun
common; ordinary; conventional; run-of-the-mill
Describes something that is unremarkable, typical, or lacking originality; often carries a slightly negative nuance of being boring or predictable.
His ideas are ordinary and lack freshness.
I only got a conventional reply.
ありきたり means 'commonplace' or 'run-of-the-mill' in a fairly neutral way, while 月並み carries a stronger, more critical implication of lacking originality.
ありきたり emphasizes something trite or hackneyed from overuse, while 平凡 simply means lacking any special quality.
Usually written in kana; the kanji forms 在り来たり etc. are rare and mostly search-only.
Rare kanji spelling; the word is normally written in kana.
Search-only kanji form; not used in normal writing.
From 在り来たり, the continuative or nominal form of 在り来たる, “to have existed or been customary from before.” It consequently came to describe something conventional, commonplace, or unoriginal.