マストで
masutode
1. Must-do; Essential
★ Common
Noun
#24054
1. Must-do; Essential
1. mast (of ship)
1. necessary; indispensable
1. Had to.; Was supposed to.
1. Must.; Should.
1. If must; If necessary
1. Was not necessary.; Was not required.
1. Must be.; Probably.
1. Not necessary.; Not required.
1. If/when deceived; If/when tricked