suffix forming nouns of action from verbs, mostly from Latin and French, meaning "act of ______ing" (such as 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 (as in bestowal, betrothal).
<a href="https://www.etymonline.com/word/arousal">Etymology of arousal by etymonline</a>
Harper, D. (n.d.). Etymology of arousal. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/arousal