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.
Oh no, I forgot to reply. What have I gotten myself into?
It said "read," but I never got a reply.
How’s it going? I thought I sent a reply to you, but it seems that I was too tired and fell asleep before pressing the ’send’ button. Sorry. Forgive me.