umbral

Adjective

 * 1) Of or relating to an umbra.
 * 2)  Of or relating to umbral calculus.

Etymology
, from, from. .

Noun

 * 1) threshold area in front of a door
 * 2) jamb upright post that frames a door or window
 * 3)  a shadowy transitory realm to where immoral spirits are attracted after their physical death
 * 1)  a shadowy transitory realm to where immoral spirits are attracted after their physical death
 * 1)  a shadowy transitory realm to where immoral spirits are attracted after their physical death

Etymology
From, from. Influenced by.

Noun

 * 1) doorstep;  stoop
 * 2)  threshold