informant

n 1 person who gives information 提供消息或情报的人: The journalist did not want to reveal the identity of his informant. 那个新闻工作者不想透露消息提供人的身分. 2 (linguistics 语言) native speaker of a language who helps a scholar make an analysis of the language 发音合作人（为语言学者分析语言提供资料的说本地话的人）.

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