Hidden /(?)/

Hid·den

Hidden

p. p. & a.
  1. from Hide. Concealed; put out of view; secret; not known; mysterious.
    Bring to light the hidden things of darkness.
    — 1 Cor. iv. 5.
    My heart, which by a secret harmony Still moves with thine, joined in connection sweet.
    By what best way, Whether of open war, or covert guile, We now debate.

Phrases & Compounds

Hidden fifths
consecutive fifths or octaves, not sounded, but suggested or implied in the parallel motion of two parts towards a fifth or an octave.