ty,ity,ability(responsibility)
ment(movement,development)
er(主动的人,employer),ee(被动的人,employee),or(主),ess(被),ist(学家),ant,ent
ance(y),ence(y)(importance,difference)
ary,ery,ory 地点、地方(library,factory)
ics,ology 学科的
ics,变形容词-ical
arithmetics 算术 art艺术,meter测量
ology,变形容词-ological
ecology 生态学 (eco-生态,ecosystem,ecobalance)
archeology 考古学 architecture建筑 arc-尖