수선이 · 수선을
mending, alteration (of clothes); repair
Example
바지가 너무 길어서 수선을 맡겼어요.
The pants were too long, so I took them in for alteration.
Word parts
수 repair+선 mend
Literally 'repair and mend.'
Good to know
수선 is mainly for clothes, shoes and bags; for machines and buildings, use 수리.