three (every three)

Examples-

tricycle – vehicle having three wheels
tri-weekly - once every three weeks

trinity – definition 1)  group of 3

            definition 2)  the union of the Father, Son, & Holy Ghost in one divine nature

water

Examples-

spelling =  hydro    =    hydr + vowel

hydrous – having to do with water
hydrodynamics - the study of the power of water

inflammation

Examples-

Note:  double "m"    (-flamm-)

carditis - inflammation of the heart
gastritis - inflammation of the stomach

before / front

Examples-

anteroom - a smaller room before a larger room                          

Important:  a hyphen before a capital letter.

ante-Christian - before the Christian era
 * *  ante meridiem    =    A.M.  (before noon)

government by

Examples-

democracy - government by the people
plutocracy - government by the wealthy

step

Examples-

downgrade - step down
graduation - condition of taking a step