thunder / (bound form) (military) mine, as in 地雷[di4 lei2] land mine / (coll.) to shock; to stun; to astound / (Tw) (coll.) spoiler / (Tw) (coll.) to reveal plot details to (sb)
square / frame / rule / (legal) case / style / character / standard / pattern / (grammar) case / (classical) to obstruct / to hinder / (classical) to arrive / to come / (classical) to investigate / to study exhaustively