English Vocabulary Flash Cards @ englishpdf.com and englishteststore.com File 302 infirmity (n) A physical, mental, or moral weakness or flaw inflammable (adj) Easily set on fire or excited inflammation (n) A morbid process in some part of the body characterized by heat, swelling, and pain inflexible (adj) That can not be altered or varied influence (n) Ability to sway the will of another influential (adj) Having the power to sway the will of another influx (n) Infusion infrequence (n) Rareness