1. agri as in agriculture   era, age   star   book   field   Hint Half-n-half Clue   2. aud as in auditory   hear, listen   swift   fit   era, age   Half-n-half Clue   3. auto as in autocrat   self   star   leader   good   Half-n-half Clue   4. act as in activate   do   fit   high   water   Half-n-half Clue   5. agog as in demagogue   book   life   kill   leader   Half-n-half Clue   6. cent as in centenary   swift   man   one hundred   sharp   Half-n-half Clue   7. ced as in recede   book   ruler, first   go   field   Half-n-half Clue