- 難しい【むずかしい】 - difficult, hard, troublesome, complicated, serious (disease, problem, etc.), impossible, unfeasible, fussy, particular, fastidious, hard to please, displeased, gloomy, glum, sullen, serious (look), dirty, unclean, filthy, detestable, unpleasant, uncomfortable, creepy, spooky 
- 避難【ひなん】 - taking refuge, finding shelter, evacuation, escape, seeking safe haven 
- 困難【こんなん】 - difficulty, hardship, trouble, distress, infeasibility, inability (to carry out) 
- 非難【ひなん】 - criticism, blame, censure, attack, reproach 
- 難民【なんみん】 - refugee, displaced person, person inconvenienced by (lack of something, etc.), person unable to satisfactorily (marry, shop, etc.), person who is stuck (in a place or situation) 
- 災難【さいなん】 - calamity, misfortune, disaster 
- 難い【にくい】 - difficult to ..., hard to ... 
- 難問【なんもん】 - perplexity, difficult question, difficult problem 
- 難航【なんこう】 - difficult voyage, stormy passage, hard flight, rough going, running into trouble, proceeding with difficulty, rough passage 
- 盗難【とうなん】 - theft, robbery 
- 難関【なんかん】 - barrier, obstacle, difficulty, hurdle, deadlock 
- 遭難【そうなん】 - disaster, accident, shipwreck, distress 
- 無難【ぶなん】 - safe (e.g. choice), secure, innocuous, inoffensive, acceptable, passable, satisfactory, adequate, faultless, without flaw 
- 難解【なんかい】 - difficult to understand, unintelligible, abstruse 
- 難点【なんてん】 - fault, weakness, flaw, defect, drawback, disadvantage, crux (of a matter), difficult point, point of contention 
- 難い【かたい】 - difficult, hard 
- 難易【なんい】 - (relative) difficulty 
- 気難しい【きむずかしい】 - hard to please, difficult, particular, fussy, choosy, picky, fastidious, bad-tempered, in a bad mood, displeased, sullen, crabby, cranky, grumpy 
- 難色【なんしょく】 - disapproval, reluctance, unwillingness 
- 避難民【ひなんみん】 - evacuees, displaced persons, refugees