십일월November 일부part; some; portion; fraction 일월January 일주일one week; a week 제일first 제일most 통일unification 동일sameness; identicalness 만일supposing 만일supposing; in case

계단stairs; staircase 교통수단means of transportation 구구단multiplication table 단계phase; step 수단means; method 특단being special 하단lower tier 계단식being step-like; be terraced; being tiered 고단수high-level trickster 다단multilevel; multistage; multiple columns

낙엽leaf fall 촌락village 추락falling; dropping; plunging 추풍낙엽fallen leaves in the fall 취락settlement; community 타락depravity; degradation 탈락being eliminated; failure 탈락자dropout; eliminated competitor 퇴락dilapidation; going to ruin 폭락plunge; nosedive