React and Contrive

verb

• Show a response or a reaction to something.
  • synonyms: respond
• Act against or in opposition to.
  • usage: "She reacts negatively to everything I say"
  • synonyms: oppose
• Undergo a chemical reaction; react with another substance under certain conditions.
  • usage: "The hydrogen and the oxygen react"

• (v.t.) To act or perform a second time; to do over again; as, to react a play; the same scenes were reacted at Rome.
• (v.i.) To act upon each other; to exercise a reciprocal or a reverse effect, as two or more chemical agents; to act in opposition.
• (v.i.) To return an impulse or impression; to resist the action of another body by an opposite force; as, every body reacts on the body that impels it from its natural state.

verb

• Make or work out a plan for; devise.
  • usage: "They contrived to murder their boss"; "design a new sales strategy"; "plan an attack"
  • synonyms: plan, project, design
• Come up with (an idea, plan, explanation, theory, or principle) after a mental effort.
  • usage: "excogitate a way to measure the speed of light"
  • synonyms: invent, devise, excogitate, formulate, forge
• Put or send forth.
  • usage: "She threw the flashlight beam into the corner"; "The setting sun threw long shadows"; "cast a spell"; "cast a warm light"
  • synonyms: project, cast, throw

• (v.i.) To make devices; to form designs; to plan; to scheme; to plot.
• (v.t.) To form by an exercise of ingenuity; to devise; to invent; to design; to plan.