'noncannibalistic' originates from English, formed by the prefix 'non-' (meaning 'not') attached to 'cannibalistic' (from 'cannibal', ultimately from Spanish 'caníbal') plus the adjectival suffix '-istic'.

'cannibal' entered English from Spanish 'caníbal'; 'cannibalistic' developed from 'cannibal' + '-istic', and 'noncannibalistic' is a modern negated adjectival formation built by adding 'non-' to that adjective.

Initially 'cannibal' referred to people thought to practice cannibalism; over time 'cannibalistic' described the behavior of eating members of one's own species, and 'noncannibalistic' simply denotes the absence of that behavior.