excogitate

verb ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about excogitate at Wordnik → Where our words come from →

1. Come up with (an idea, plan, explanation, theory, or principle) after a mental effort.

   excogitate a way to measure the speed of light

2. Reflect deeply on a subject.

   I mulled over the events of the afternoon