definition of
excogitate

[1] #1 excogitate v. [invent, contrive, devise, formulate, forge] come up with (an idea, plan, explanation, theory, or principle) after a mental effort; "excogitate a way to measure the speed of light". wn

[2] #2 excogitate v. [chew over, think over, meditate, ponder, contemplate, muse, reflect, mull, mull over, ruminate, speculate] reflect deeply on a subject; "I mulled over the events of the afternoon"; "philosophers have speculated on the question of God for thousands of years"; "The scientist must stop to observe and start to excogitate". wn