A Slump
Sluggish
noun, な adjective
ふしん
不信 (ふしん) Distrust, Mistrust, Discredit, Unfaithfulness
不振 (ふしん) A Slump, Sluggish
鈍い (にぶい、のろい) Dull, Thickheaded
Dullness and Stagnation because nothin's 不 shaking 振