Incubate is an interesting word. It comes from Latin and is used mainly to discuss the development of something. It was originally used to discuss the process of hatching eggs. It's synonyms include the word brood.
Why am I discussing the word incubate? Well, partly because I couldn't think of a good 'i' word. Partly because it is an interesting little concept. Incubation, germination, growth. They're all very powerful concepts. We invoke them regularly. We lie metaphorically in the state of contemplation and consideration of things when we are 'hatching' an idea.
Incubate is a word that was used in the deep past mostly with respect to birds hatching eggs. Birds are almost universally considered 'Air' oriented. They are possessed of the inspiring ability of flight. Their song greets us in the morning and sends off the day at dusk. Ideas are often described as having wings. Thoughts are often described by poets as feathered things that flit and flirt about like their avian counterparts.
It is an interesting little flight of fancy. And it all started with the word incubate. Makes you wonder just how many other things can take wing and become their own song with a little ingenuity and imagination.