To live in or on another organism as a parasite; to survive by absorbing nutrients from a host organism

Suffix used after verbs or adjectives to form nouns expressing a state, quality, or scope, similar to English "-ity", "-ness", or "-ism".

mouth of a person or animal; (bound form) oral

inside; within; inner; internal; specifically refers to the interior or domestic domain as opposed to the exterior or foreign domain; often used in spatial or temporal contexts

(bound form) inflammation; infection; often used as a suffix for medical conditions ending in "-itis"