I'll go to the airport to see you guys off.
I wonder which is harder, being the person who sees someone off or being one who is seen off by someone.
Koichi burst into tears after seeing them off.
You know the words 見る and 送る by now, hopefully. Here you're "seeing" the "sending." You're seeing someone off, so this verb is to see off.
The readings come from the vocab words 見る and 送る. Make sure you know those and you'll know this word's reading as well.