idiopathic /id-i-ō-pathˈik/

1. (of a state or experience) peculiar to the individual
2. (of a disease, etc) arising spontaneously from some unknown cause, primary

idiopathˈically adverb

idiopˈathy noun

• infrared astronomy
• infrared photography
• infrared radiation
• infrareds
• infrasonic
• infrasound
• infrasounds
• infraspecific
• infrastructural
• infrastructure
• infrastructures
• infrequence
• infrequences
• infrequencies
• infrequency
• infrequent
• infrequently
• infringe
• infringed
• infringement
• infringements
• infringer
• infringers
• infringes
• infringing