1. acoustics   compulsion or repression.   purging of passage of body; outlet to emotion.   science dealing with sound.   degeneration; humiliation.   Hint Half-n-half Clue   2. atavism   resemblance to remote ancestors than parents.   science dealing with sound.   deficiency of red blood corpuscles.   attrition by rubbing or disagreement.   Half-n-half Clue   3. cipher   secret code used to encrypt messages.   sharp-edged tool used for cutting.   defect in eye or lens preventing proper focusing.   agent to speed up chemical reaction without it changing.   Half-n-half Clue   4. floe   plants of a region.   floating sheet of ice.   wasting away.   base framework of automobile or carriage.   Half-n-half Clue   5. degradation   degeneration; humiliation.   tree bearing fruit-cones.   reservoir or tank for water.   masses of leaves or leafage.   Half-n-half Clue   6. decomposition   something taken for granted or usurping authority.   opening or gap.   point on which lever is supported.   decay; breaking into component parts.   Half-n-half Clue   7. extrapolation   guesswork.   tooth of a wheel.   collarbone.   conjecture or logical projection beyond range.   Half-n-half Clue