수공handcraft 입수to obtain 가수singer 박수applause; clapping 선수athlete; player; representative player 세수washing up 수su 수건towel 수술surgery; operation 수첩pocket notebook

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