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Word Parts Beginning With I
20 word parts in the Medical Terminology guide begin with the letter I — prefixes, word roots and suffixes together. Every entry links to its own page with worked examples.
A B C D E F G H I J K L M N O P Q R S T U V X Z
| Word part | Type | Meaning |
|---|---|---|
| -ia | Suffix | condition |
| -iasis | Suffix | abnormal condition; infestation |
| iatr | Word root | physician, medical treatment |
| -iatry | Suffix | medical treatment; specialty |
| im- | Prefix | not; in, into (variant of in- used before certain letters) |
| immun | Word root | immune; immunity |
| in- | Prefix | not; in, into, inside |
| infra- | Prefix | below, beneath |
| inguin | Word root | groin |
| insul | Word root | islands; islets of the pancreas, insulin |
| insulin | Word root | insulin; pancreatic islet hormone |
| inter- | Prefix | between |
| intra- | Prefix | within, inside |
| intro- | Prefix | into, inward |
| irid | Word root | iris of the eye |
| -ism | Suffix | condition; process |
| iso- | Prefix | equal, same |
| -ist | Suffix | specialist |
| -itis | Suffix | inflammation |
| -ium | Suffix | structure; tissue; element |
Please note: This section teaches the language of medicine — what word parts mean and how terms are built. It is an educational reference, not medical advice. For the meaning of a word in your own medical record, ask the clinician who wrote it.