To appear or occur; be generated.
To produce as a result of a chemical or physical process.
To procreate, beget.
To form a figure from a curve or solid.
To bring into being; give rise to.
To impede, retard, or interfere with; hinder.
To get in the way of so as to hide from sight.
To block or fill (a passage) with obstacles or an obstacle. See synonyms at block.