To Finish Something
To Settle Something
transitive verb, godan verb
Remember 済む and how it means "to come to an end." This is like that, but slightly different. This is to finish something or to settle something, because this is when you're doing the coming to an end action. You can remember this because you're coming in to finish the score uno mas (ます) time. This is the last time.
The reading is the same as the one you learned with 済む, so if you know that you'll be able to finish this vocab.
トイレは法律事務所で済ませてきました。
I went to the bathroom at the law office.
私は本当に何もやっていません。今朝そこで、父のためにちょっと用事を済ませていただけなんです。
I swear I didn’t do anything. I was just running some errands there for my dad this morning.
済んだ話を何度も蒸し返すのは良くない。
It's not good to rehash settled arguments over and over again.