endarken

en- +‎ darken (see en- (“intensifying prefix”)), modelled on enlighten.[1]

• (General American) IPA^(key): /ɪnˈdaɹkɪn/
• (Received Pronunciation) IPA^(key): /ɪnˈdɑːkən/, /ɛnˈdɑːkən/

endarken (third-person singular simple present endarkens, present participle endarkening, simple past and past participle endarkened)

1. (transitive, rare, chiefly literary) To render dark or darker.
   • 1711, John Strype, Life and Acts of Matthew Parker, Archbishop of Canterbury:

     Suffer not Satan to endarken your consciences; let brawlings cease, and let unity be seen.

   • (Can we find and add a quotation of Roger Scruton to this entry?)

     […] moral education cannot be […] purely enlightened and enlightening […] it cannot be simply a matter of teaching [people] to calculate the long term profit and the loss, while leaving […] desires to develop independently. It must involve an endarkened and endarkening component, by which [people] are taught precisely to cease [their] calculations, to regard certain paths as forbidden, as places where neither profit nor loss has authority.

2. (transitive, chiefly literary) To becloud, obscure, to obfuscate; to confound.

• (antonym(s) of “render dark”): enlighten

• enranked, rankened