to sink into · to get caught up in · to land in (a predicament)

He deliberately exposed her to danger.

It was in 1832 that Evariste Galois fell in love with Stephanie-Felicie Poterin du Motel.

We were faced with an unusual situation because of the accident.

In adolescence, I hated life and was continually on the verge of suicide, from which, however, I was restrained by the desire to know more mathematics.

Now Marina was a romantic; she had not yet fallen into that passive state of mind which accepts that one should find a corner to live, anywhere, and then arrange one's whole life around it.