informative

a.增进知识的；增长见识的

inflection (also inflexion), inflectional, inflexibility, inflexible, inflexibly, inflict, infliction, inflorescence, inflow, influence, influence on, influential, influenza, influx, inform, informal, informality, informally, informant, information, informed, informer, infra, infra dig, infra-, infra-red, infraction, infrared, infrastructure, infrequency, infrequent, infrequently, infringe, infringement, infuriate, infuriating, infuriatingly, infuse, infusion, ingenious,