Blindsiding is a term used to describe an unexpected or surprising event or situation that catches us off guard. Antonyms for blindsiding could be forewarned, informed, advised, or alerted. These antonyms suggest that one has been given advance notice or warning about what to expect. Other antonyms could be anticipated, expected, predicted, foreseen, or projected. These words imply that whatever is happening or about to happen is not a surprise, but rather something that was expected. Overall, the antonyms for blindsiding all suggest a sense of preparation and readiness, rather than being taken by surprise.