soulless adj.

"A substantial entity believed to be that in each person which lives, feels, thinks, and wills" [Century Dictionary], Middle English soule, from Old English sawol "spiritual and emotional part of a person, animate existence; life, living being," from Proto-Germanic *saiwalō (source also of Old Saxon seola, Old Norse sala, Old Frisian sele, Middle Dutch siele, Dutch ziel, Old High German seula, German Seele, Gothic saiwala), a word of uncertain origin.

It has been suspected to have meant originally "coming from or belonging to the sea," the supposed stopping place of the soul before birth or after death [Barnhart]; if so, it would be from Proto-Germanic *saiwaz (see sea). Klein explains this as "from the lake," as a dwelling-place of souls in ancient northern Europe.

The meaning "disembodied spirit of a deceased person" is attested in Old English. As a synonym for "person, individual, human being" (as in every living soul) it dates from early 14c. Soul-searching (n.) "deep self-reflection, examination of one's conscience" is attested from 1871, from the phrase used as a present-participle adjective (1610s). Distinguishing soul from spirit is a matter best left to theologians.

word-forming element meaning "lacking, cannot be, does not," from Old English -leas, from leas "free (from), devoid (of), false, feigned," from Proto-Germanic *lausaz (cognates: Dutch -loos, German -los "-less," Old Norse lauss "loose, free, vacant, dissolute," Middle Dutch los, German los "loose, free," Gothic laus "empty, vain"), from PIE root *leu- "to loosen, divide, cut apart." Related to loose and lease.