The term 'ACT SERVILE' can be defined by two crossword solutions: KOWTOW and GROVEL. KOWTOW is an act of deep respect shown by kneeling and bowing one's head to the ground. It is a traditional Chinese custom, often used to show reverence to an emperor or other authority figure. GROVEL is an act of servility or submission, usually involving crawling or lying prostrate on the ground. It is often used to express extreme humility or to beg for forgiveness. Both KOWTOW and GROVEL are acts of servility that demonstrate deference and submission.