Breakdown of Когда я наконец выслушал её до конца, стало ясно, что мне не стоило так долго оправдываться.
Questions & Answers about Когда я наконец выслушал её до конца, стало ясно, что мне не стоило так долго оправдываться.
Выслушал means listened to all of it / heard her out, while слушал just means was listening.
The prefix вы- often adds a sense of completion. So:
- слушать = to listen
- выслушать = to listen to someone fully, to the end
In this sentence, Когда я наконец выслушал её до конца... suggests that the speaker did not just listen in general, but finally let her finish and heard everything she had to say.
До конца literally means to the end.
With выслушал её до конца, it reinforces the idea of hearing her all the way through, without interrupting or stopping early.
So:
- выслушал её = heard her out
- выслушал её до конца = heard her out completely, to the very end
It is slightly emphatic here, because выслушать already implies completion, but Russian often uses both together for clarity or emphasis.