Subcovering

Part of speech: noun, verb

Definitions

1. A layer or covering that is placed underneath another outer covering or garment
2. Material or a cover positioned below and concealed by a higher or outer covering
3. A subordinate covering layer that serves as a base beneath a primary protective covering

Etymology: "Subcovering" is a plain compound: the prefix "sub-", meaning "under" or "beneath", attached to "covering", a noun for something that spreads over a surface to protect or conceal it. Put together, it names a layer that lies beneath an outer covering, the sense in which it is used in construction and manufacturing, where one material is laid under another as a base or backing. The word is transparent enough that its meaning can be read directly from its parts, which is typical of technical vocabulary built from common English elements. Its parts are both native English formations, so there is no borrowing from another language to trace.