He complains that his boss doesn’t deal with clients’ complaints.
My computer couldn't process the data and froze.
That player is good at taking care of ground balls.
I can deal with it, no matter what the reason. I can take care of this problem, process it, and deal with it on my own.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.