Antonyms of adj adventitious

1 sense of adventitious

Sense 1
adventitious -- (associated by chance and not an integral part; "poetry is something to which words are the accidental, not by any means the essential form"- Frederick W. Robertson; "they had to decide whether his misconduct was adventitious or the result of a flaw in his character")

INDIRECT (VIA extrinsic) -> intrinsic, intrinsical -- (belonging to a thing by its very nature; "form was treated as something intrinsic, as the very essence of the thing"- John Dewey)

Similarity of adj adventitious

1 sense of adventitious

Sense 1
adventitious -- (associated by chance and not an integral part; "poetry is something to which words are the accidental, not by any means the essential form"- Frederick W. Robertson; "they had to decide whether his misconduct was adventitious or the result of a flaw in his character")
       => extrinsic (vs. intrinsic) -- (not forming an essential part of a thing or arising or originating from the outside; "extrinsic evidence"; "an extrinsic feature of the new building"; "that style is something extrinsic to the subject"; "looking for extrinsic aid")