suffix forming adjectives from nouns or other adjectives, "of, like, related to," Middle English -al, -el, from French or directly from Latin -alis (see -al (2)).
suffix forming nouns of action from verbs, mostly from Latin and French, meaning "act of ______ing" (e.g. survival, referral), Middle English -aille, from French feminine singular -aille, from Latin -alia, neuter plural of adjective suffix -alis, also used in English as a noun suffix. Nativized in English and used with Germanic verbs (e.g. bestowal, betrothal).
-al 3
suff.
Aldehyde: butyral.