ko-a (transitive verb) to try; to essay; to strive; to attempt; to endeavour; to test; to dare; to perceive; to venture. aitam aswam: to have a go at; to try to do something. atam edou akwap: it rains very heavily or it rains cats and dogs. aitam nuipedori kere: to do your best; to do what you can; to try hard.