In-generate means something that is inherent, innate, or natural to a person or thing. However, antonyms for this word include extrinsic, acquired, or imposed. Extrinsically means that something is external or outside of a person or thing, while acquired means that something is gained or learned over time. Imposed means that something is forced, rather than inherent. Thus, when we use antonyms for the word in-generate, we are referring to qualities that are not inherent or natural to a person or thing, but rather something that is acquired, imposed, or external.