kě chéng zhī jī
(idiom) an opportunity that someone (usually a villain or adversary) can exploit
可
kě
(prefix) can; may; able to; -able
乘
chéng
old variant of 乘[cheng2]
之
zhī
(possessive particle, literary equivalent of 的[de5])
机
jī
(bound form) machine; mechanism
