-al; -ial, -eal

(Latin: suffix; pertaining to, like, of the kind of, relating to, characterized by, belonging to; action of, process of)

homogene, homogeneal
Of the same race.
hymeneal
Wedding or bridal song.
hypogeal
iliococcygeal
immortal
1. Not mortal; not liable or subject to death; deathless, undying; living for ever; such as, the immortal soul.
2. In a wider sense, not liable to perish or decay; everlasting, imperishable, unfading, incorruptible.
3. Of fame, or of famous works or their authors; lasting through an unlimited succession of ages that will not fade from the memory of men; remembered or celebrated through all time: "Shakespeare's immortal plays."

To make a speech immortal you don't have to make it everlasting.

—Lord Leslie Hore-Belisha
inaugural (adjective) (not comparative)
Relating to the beginning of an institution, an activity, or a formal ceremony to mark the beginning of a major public leader's term in office: There have been many Inaugural Addresses of the Presidents of the United States.

The inaugural speeches are made in connection with the following Executive Oath of Office: "I do solemnly swear (or affirm) that I will faithfully execute the Office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States."

— United States Constitution, Article II, Section 1, Clause 8
incorporeal (adjective), more incorporeal, most incorporeal
1. Relating to something that is not composed of matter; having no material nor physical existence.
2. Etymology: from Latin incorporeus; from in-, "not" + corporeus, "body" + -al, "relating to" .
infinitesimal (adjective), more infinitesimal, most infinitesimal
Resembling something that is very small or minute: Even though the infinitesimal speck Marie had in her eye was quickly removed, it had been feeling like a boulder because it was so painful.
Pertaining to something that is very small.
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Relating to that which is minute and almost incalculable.
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interdigital
1. Between the fingers or toes; as, interdigital space.
2. Occurring between the digits.
intergluteal
Between the buttocks which is the prominence formed by the gluteal muscles on either side.
intracorporeal (adjective), more intracorporeal, most intracorporeal
A reference to being located or occurring within a body: Naturally, some intracorporeal parts are the lungs, the heart, the stomach, the bones or the skeleton, the brain, the muscles, etc.
intragluteal
Situated within the gluteal muscle or introduced into the gluteal muscle: "The doctor made an intragluteal injection."
juxtaepiphyseal
Near to or adjoining an epiphysis.
labioglossalaryngeal
Pertaining conjointly to, or the joining of, the lips, tongue, and larynx.
lacteal