着込きこむ

1. 1to wear (multiple layers of clothes) ; to wear underneath ; to bundle up ; to dress warmly Translated by Jiyomi
2. 2to dress up (esp. in formal clothes) ; to attire oneself (in) ; to put on (e.g. a dress)
3. 3to break in (through repeated wearing) ; to wear in

Other writings and readings

JMdict entry 1423040 · frequency rank 38. Source and licence.