The term 'suppress completely' can be expressed in two words: 'QUASH' (5 letters) and 'SQUELCH' (7 letters). Both words mean to put an end to something, usually by force or authority. QUASH is derived from the Latin word quassare, which means to shake or shatter. SQUELCH is derived from the Middle English word squelchen, which means to crush or press down. Both words are used to describe the act of suppressing something completely, such as a rebellion or protest.