intrepid

adj. 无畏的，刚毅的

intone, intoxicant, intoxicate, intoxication, intra-, intra-uterine, intractability, intractable, intractably, intramural, intramuscular, intransigence, intransigent, intransigently, intransitive, intransitively, intrastate, intravenous, intravenously, intrench, intrepidity, intrepidly, intricacy, intricate, intricately, intrigue, intriguer, intriguing, intrinsic, intrinsically, intro, introduce, introduction, introductory, introspect, introspection, introspective, introversion, introvert, introverted,