Antonyms of adj bastioned

1 sense of bastioned

Sense 1
bastioned, fortified -- (secured with bastions or fortifications)

INDIRECT (VIA protected) -> unprotected -- (lacking protection or defense)

Similarity of adj bastioned

1 sense of bastioned

Sense 1
bastioned, fortified -- (secured with bastions or fortifications)
       => protected (vs. unprotected) -- (kept safe or defended from danger or injury or loss; "the most protected spot I could find")