1. assumption   mutual relation.   something taken for granted or usurping authority.   exhalation affecting smell.   machine to separate substances by spinning.   Hint Half-n-half Clue   2. atavism   drug or treatment preventing infection.   deviation from center or oddity.   resemblance to remote ancestors than parents.   giving off of gas bubbles or exuberance.   Half-n-half Clue   3. friction   animals of a region or era.   attrition by rubbing or disagreement.   maker of maps.   plants of a region.   Half-n-half Clue   4. eddy   cutting for analysis or examination.   swirling motion of water or air.   absence of contradictions or uniformity.   compulsion or repression.   Half-n-half Clue   5. fulcrum   point on which lever is supported.   resemblance to remote ancestors than parents.   drug that reduces pain.   swirling motion of water or air.   Half-n-half Clue   6. delta   reservoir or tank for water.   agent to speed up chemical reaction without it changing.   triangular tract of mud or sand at river's mouth.   eye disorder leading to partial blindness; waterfall.   Half-n-half Clue   7. constraint   compulsion or repression.   ability to produce desired effect.   tooth of a wheel.   lizard noted for changing color to surroundings.   Half-n-half Clue