Dictionary Definition :
Definition[1]
:
darken : (v.t.) timirāyati; tamasā āvarati; kalusayati. (pp.) timirāyita; tamasā āvuta; kalusayita.
Source
:
A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]