도리없이 ~았/었어요 · 도리가 없다
with no other way, inevitably, helplessly
Example
길이 너무 막혀서 도리없이 걸어갔어요.
The traffic was so bad that I had no choice but to walk.
Word parts
도 way+리 reason
Literally 'without a way (도리) to do it'.
Good to know
Often spaced as 도리 없이; the predicate form is 도리가 없어요 'There's no way.'