Principal English Translation: 

to be lying down, spread out, possibly sleeping

Attestations from sources in English: 

This suffix is found on many verbs ending in -toc that make it clear that a prone body is part of the compound. The verb toca also means to bury, which can imply a prone body:
toca, to bury, https://nahuatl.wired-humanities.org/content/toca
onotoc, to be lying down, https://nahuatl.wired-humanities.org/content/onoctoc
cochtoc, to be lying down asleep, https://nahuatl.wired-humanities.org/content/cochtoc
tectoc, to lie spread out in a body, https://nahuatl.wired-humanities.org/content/tectoc
nantoc, to be lying down, stretched out, https://nahuatl.wired-humanities.org/content/nantoc

See also: