Grammar › N2 · 13 Obligation and permission
〜ほかない: have no choice but to
N2 · 13 Obligation and permission
Says there is no other way than to do this.
Verb dictionary form + ほかない (also ほかはない, 〜よりほかない). Used when a problem leaves only one option. Compare 〜しかない, which is the everyday form, and 〜ざるを得ない, which is formal.
Examples
バスがないので、歩いて帰るほかない。
There is no bus, so I have no choice but to walk home.
こうなったら、最後まで頑張るほかありません。
Now that it has come to this, all we can do is do our best until the end.