以い往おう

noun, used as a suffix

after; and later

Only when written 以往

Formal or literary suffix attached to a time expression to mean 'after that time' or 'and later'. Restricted to the kanji form 以往.

• 卒そつ業ぎょう以い往おう、彼かれとは会あっていない。

  I haven't seen him since graduation.

• 明めい治じ以い往おうの日本にほん文ぶん学がくを研けん究きゅうしている。

  I study Japanese literature from the Meiji period onward.

noun, used as a suffix

before; prior to

Formal or literary suffix meaning 'before a certain time' or 'prior to'. Less common than the 'after' sense; context usually makes the meaning clear.

• 開かい戦せん以い往おうの外がい交こう文ぶん書しょを調ちょう査さする。

  We investigate diplomatic documents from before the outbreak of war.