The word 'volitional' is built upon the noun 'volition,' which originates from the Latin verb velle, meaning "to wish or to will." This Latin root is itself derived from the Proto-Indo-European base welh₁-, which conveyed a sense of wishing or choosing, a concept also ancestral to the English word "will." The suffix -alis was added in Latin to form adjectives, a pattern inherited directly into English as -al. Thus, the literal construction "of or relating to volition" evolved seamlessly into its modern psychological and philosophical meaning, describing any process or action characterized by the conscious exercise of the will.

Structure: volition (will) + al (adjective suffix) - volition: From Latin volitio (act of willing), from velle (to wish, to will). Functions as the core noun root. - al: A suffix of Latin origin (-alis) used to form adjectives meaning "of, relating to, or characterized by."