A Slump
Sluggish
noun, な adjective
If something does not shake, it’s probably in a slump. If nothing’s shaking, things must be sluggish.
不振 is used for times when things are slower or worse than usual. For example, 業績不振 is when a business isn’t doing as well as it usually does, and 食欲不振 is when you don't feel like eating as much as you normally would.
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.
成績不振
poor sports performance, poor academic performance
業績不振
poor business performance
経営不振
business slump
食欲不振
loss of appetite
イチローは今季は不振なようだね。
It seems like Ichiro is in a slump this season, wouldn't you say?
最近、食欲不振が続いてるんです。
I've been experiencing a loss of appetite recently.
私のCDはしばらく売上不振に苦しんでいたが、ラジオで紹介されてから今月は売上げが上昇しています。
My CD was suffering from a slump in sales for a little while, but since being introduced on the radio, sales are rising again this month.