migrate v 迁移,移居 (migr+ate)
migratory a 移居的,漂泊的 (migr+atory)
migrant n 候鸟,迁移者 (migr+ant 人或物=迁移的鸟=候鸟)
emigrate v 移居 [外国] (e 出+migr+ate=移出)
émigré n 移居境外者,流亡者 (e 出+migre 移)
immigrate v 移居,入境 (im 进+migr+ate=移进)
transmigration n 移居 (trans 交换+migr+ation=交换移=移居)
migraine n 偏头痛 (migr+ine=移来移去的[头痛]=偏头痛)