くじく
挫く
kujiku

Godan Verb (ku)

1. to sprain; to twist

Transitive
Usually Written in Kana
観客かんきゃくがわから相手あいてチームをわらってやることは、その士気しきをくじくことになろう。
kankyakugawakara aitechiimuo waratte yaru kotowa sono shikio kujiku kotoni narō.
It would demoralize the opposing team to give it the razz from the spectators' side.
Godan Verb (ku)

2. to dampen (enthusiasm); to discourage; to dishearten; to dispirit; to depress; to unnerve; to crush

Transitive
Usually Written in Kana