The term 'act on' can be broken down into four separate words: INFLUENCE, LEAP, FOLLOW, and AFFECT. INFLUENCE is a nine-letter word meaning to have an effect on the character, development, or behavior of someone or something. LEAP is a four-letter word meaning to move suddenly and quickly in a particular direction. FOLLOW is a six-letter word meaning to go after or come after in order. AFFECT is a six-letter word meaning to produce a change in or to act upon. Together, these words form the phrase 'act on, ' which means to take action based on a certain set of circumstances.