N2

万が一

Just in case, In the worst-case scenario, In the unlikely event, By any chance

No related sentences

たとえ〜ても

Even if…is the case, Supposing that

ばあいは

In the event of, In the case of

っこない

There is no chance of, There is no way of, Impossible

はずがない

Hardly possible, Cannot be, Highly unlikely, Improbable