· come up with (an idea, plan, explanation, theory, or principle) after a mental effort; "excogitate a way to measure the speed of light"
Synonym(s): invent, contrive, devise, formulate, forge
Hypernym(s): create_by_mental_act, create_mentally
· 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"
Synonym(s): chew_over, think_over, meditate, ponder, contemplate, muse, reflect, mull, mull_over, ruminate, speculate
Hypernym(s): think, cogitate, cerebrate