baneful

comparative more baneful · superlative most baneful

1. archaicPoisonous, deadly.

   [S]ome fell ſerpent in his cave expects / The traveller's approach, batten'd vvith herbs / Of baneful juice to fury, forth he looks / Hideous, and lies coil'd all around his den.

   1791, Homer, “[The Iliad.] Book XXII.”, in W[illiam] Cowper, transl., The Iliad and Odyssey of Homer, Translated into Blank Verse, […], volume I, London: […] J[oseph] Johnson, […], →OCLC, page 577, lines 106–109

2. Harmful, injurious.

   This contempt of the understanding in early life has more baneful consequences than is commonly supposed […]

   1791 (date written), Mary Wollstonecraft, A Vindication of the Rights of Woman: With Strictures on Political and Moral Subjects, London: […] J[oseph] Johnson, […], published 1792, →OCLC

   1 more example

   In this way writers and others seeking a monopoly for their views accepted and encouraged the baneful principle that it was for the party and state authorities to permit or prohibit this or that form of art.

   1978 [1976], Leszek Kołakowski, translated by P[aul] S[teven] Falla, Main Currents of Marxism, volume III: The Breakdown, Oxford: Clarendon Press, translation of Główne nurty marksizmu: rozkład (in Polish), →ISBN, →OCLC, page 52