List: adjectival nouns or quasi-adjectives (keiyodoshi)

popular  JLPT N2  な adjective  adjective (generic)  noun  noun (generic)  mathematics  computing 

• vague, ambiguous, unclear
• shady, disreputable
• fuzzy

popular  JLPT N1  な adjective  adjective (generic)  noun  noun (generic) 

• funny, comical, humorous, laughable
• ridiculous, silly, absurd

popular  noun  noun (generic)  な adjective  adjective (generic) 

• emptiness, hollowness, vacancy, void
• inanity, pointlessness, meaninglessness

popular  JLPT N1  noun  noun (generic)  noun or participle taking the aux. verb する  transitive verb  な adjective  adjective (generic) 

• thrift, economy, frugality

popular  JLPT N2  な adjective  adjective (generic) 

• miserable, wretched, unhappy, sad, pitiable

popular  な adjective  adjective (generic)  noun  noun (generic) 

• one's weak point

popular  JLPT N1  noun  noun (generic)  な adjective  adjective (generic) 

• rudeness, impoliteness, discourtesy, insolence

popular  な adjective  adjective (generic)  noun  noun (generic)  noun or participle taking the aux. verb する 

• busyness, a lot of things to do
• frequent use, heavy use (of), many uses

popular  search-only kanji form  な adjective  adjective (generic)  noun  noun (generic) 

• haughty, arrogant, insolent, proud, overbearing

popular  な adjective  adjective (generic)  noun  noun (generic) 

• fine (grain, workmanship, etc.), close (weave), delicate, intricate, elaborate
• precise, accurate, careful, meticulous, close (e.g. observation), minute, elaborate (e.g. plan)