complex (not simple or straightforward)

mechanism - mechanical structure, and its function / organisation; agency - a group of people/legal entities with purpose and rules

very; extremely / exceedingly; tremendously

extraordinary, unusual

emergency

(rare, possibly obsolete) a clock, a watch, a timepiece, a timekeeper

a clock, a watch, a timepiece, a timekeeper

stairs used in emergencies

state of emergency (unusually difficult or dangerous situation)

(chess, shogi, game of Go) a timer; a chess clock, a shogi clock, a go clock, etc.