Even a genius cannot solve that problem.
→ See also demo and temo/demo. inai 以内
[NOUN]
within, less than, not more than
Inai is a noun that denotes length, quantity, or amount within the specified limitations.
五分以内に戻ります。 Go fun inai ni modorimasu. I’ll be back within five minutes.
旅行の費用は五万円以内です。 Ryokō no hiyō wa go man en inai desu. The expense for the trip will be less than fifty thousand yen.
駅はここから歩いて十五分以内の所です。 Eki wa koko kara aruite jū go fun inai no tokoro desu. The train station is within fifteen minutes’ walk from here.
3人以内なら, 料金は同じです。 San nin inai nara, ryōkin wa onaji desu. If there are three or fewer people, the fee should be the same.
→ See also made. irai 以来
[CONJUNCTION]
since
Irai is a noun that denotes the time after the specified point in time in the past. It follows nouns or verbs in the te-form.
先月以来雨が降っていません。 Sengetsu irai ame ga futte imasen. It has not rained since last month.
私は教師になって以来五年になります。 Watashi wa kyōshi ni natte irai go nen ni narimasu. It is five years since I became a teacher.
→ See also igo, ikō, and kara. irassharu いらっしゃる
[AUXILIARY VERB]
be . . . ing, have (done), be (done), have been . . . ing