From Wiktionary, the free dictionary
Presumably of native Korean origin.
마수다 • (masuda) (infinitive 마수어 or 마숴, sequential 마수니)
- (Yukjin, Russia, Northern Hamgyong) to break, smash, be damaged
- Synonyms: (standard Korean) 부수다 (busuda), (North Korea) 마스다 (maseuda)
2015 February 14, 김영록 [gimyeongnok], “심청전 [simcheongjeon]”, in 한국구비문학대계 [han'gukgubimunhakdaegye][1], 우즈베키스탄 [ujeubekiseutan]:파도치며 배를 마서 잃을 혱편이지.- Padochi-myeo bae-reul maseo ir-eul hyengpyeon-i-ji.
- The waves were crashing and the situation meant the boat would be smashed and lost.