Jobs designed the entire workplace to maximise the chance of strangers bumping into each other, striking up conversations and learning from one another -> What does "strike up" mean?

Cities, however, allow our ingenuity to grow by pulling huge numbers of different people together, who then exchange ideas -> what does "ingenuity" mean?

Creativity, it seems, thrives on serendipity -> what does "serenpidity" mean?

As for predictions that the rise of the Internet would make the need for shared working space obsolete, Lehrer says research shows the opposite has occurred -> what does "obsolete" mean?

What does "emanate" mean in this sentence? The predictive signal is a steady rhythm of alpha waves emanating from the brain’s right hemisphere, which are closely associated with relaxing activities.

What is a swiffer?

However, to be more imaginative, says Lehrer, it’s also crucial to collaborate with people from a wide range of backgrounds because if colleagues are too socially intimate, creativity is stifled -> What does "stifle" mean?