en·trails 
(
ĕn
tr
ālz
′, -tr
əlz)
pl.n.1. The internal organs, especially the intestines; viscera.
2. Internal parts: the entrails of a car engine.
[From Middle English entraille, from Old French, from Medieval Latin intrālia, alteration of Latin interānea, from neuter pl. of interāneus, internal, from inter, within; see en in the Appendix of Indo-European roots.]