Shirabe
可き

可きべき

Common auxiliary
English jmdict
1
auxiliary word usually written using kana alone should;must;ought to
after the dictionary form of a verb
あなたにはまず最初に尋ねるべきだったでしょうか。
Should I have asked you first?

可しべし

auxiliary 'ku' adjective (archaic)
English jmdict
1
auxiliary · 'ku' adjective (archaic) formal or literary term word usually written using kana alone must;should;ought to
See also: 可き (べき)
各会員は会費を払うべし。
Each member has to pay a membership fee.
2
auxiliary adjective · 'ku' adjective (archaic) formal or literary term word usually written using kana alone will (surely);be bound to;must
3
auxiliary · 'ku' adjective (archaic) formal or literary term word usually written using kana alone will (do);shall
indicates volition