the mind > mental capacity > knowledge > hiding, concealing from view > keeping from knowledge > hidden or indirect meaning > [noun] (30)
The signifying in addition; inclusion of something in the meaning of a word besides what it primarily denotes; implication.
The second view; that which is seen upon a second view; an ulterior meaning. Obsolete.
(under-, prefix1 affix 4b.)
(under-, prefix1 affix 4b.)