inflexible

a.1.不可弯曲的,僵硬的;2.不可改变的,固执的

infinity, infirm, infirmary, infirmity, inflame, inflamed, inflammability, inflammable, inflammation, inflammatory, inflatable, inflate, inflated, inflation, inflationary, inflect, inflected, inflection (also inflexion), inflectional, inflexibility, inflexibly, inflict, infliction, inflorescence, inflow, influence, influence on, influential, influenza, influx, inform, informal, informality, informally, informant, information, informative, informed, informer, infra,