poliorcetics

Partly: * borrowed from Late Latin poliorcetica (“siege engines”) + English -s (suffix forming pluralia tantum) (poliorcetica is derived from Koine Greek πολιορκητικά (poliorkētiká, “things related to sieges”), the neuter plural of πολιορκητικός (poliorkētikós, “relating to poliorcetics, poliorcetic”), from Ancient Greek πολῐορκέω (polĭorkéō, “to besiege, blockade”) (from πόλις (pólis, “city”) + ἕρκος (hérkos, “enclosure; fence”)) + -τῐκός (-tĭkós, suffix forming adjectives meaning ‘of or relating to’)); and * from poliorcetic (“relating to poliorcetics”) + -s (suffix forming pluralia tantum).

来源：wiktionary