temperamental
US
UK temperamental adj: (person: moody) (本义，人)
SC 情绪波动大的，喜怒无常的 qíng xù bō dòng dà de，xǐ nù wú cháng de
Teenagers can be temperamental and difficult to talk to.
temperamental adj: figurative (machine: malfunctioning) (比喻)
SC 时常故障的 shí cháng gù zhàng de
My computer is being temperamental again; maybe I should take it to the repair shop.