1. must, should, ought to

auxiliary 'ku' adjective (archaic) word usually written using kana alone formal or literary term

2. will (surely), be bound to, must

auxiliary adjective 'ku' adjective (archaic) word usually written using kana alone formal or literary term

3. will (do), shall

auxiliary 'ku' adjective (archaic) word usually written using kana alone formal or literary term