に足る

に足る is used to express that something is sufficient in value, quality, or importance to deserve a certain evaluation, action, or judgment.

It often appears in the form ～に足る＋Noun, meaning “worthy of ～” or “enough to be ～”.
This grammar has a formal and objective tone and is mainly used in written Japanese, such as articles, evaluations, reports, and academic writing.

The negative form に足りない is also very common and means “not worthy of / insufficient”.

• ✔ Expresses value or sufficiency

• ✔ Often used with abstract nouns like:

  • 評価・信頼・検討・尊敬

• ✔ Common in formal / written contexts

• ❌ Rare in casual conversation

• ❌ Not used for physical quantity alone