月並み

1. Origins, structure, and basic meaning

• Structure: 月並み is read as つきなみ and is a な-adjectival noun meaning commonplace, conventional, or lacking originality.
• Basic usage: Use 月並みな表現 before a noun and 感想は月並みだった as a predicate.

2. Common pitfalls and similar expressions

• Not literal monthly frequency
  • In this sense it evaluates something as conventional or unoriginal and does not mean that it occurs every month.
• Strength of criticism
  • It can criticize a cliché, but an ordinary response may still communicate sincere feeling, so it does not reject all value.