migr=remove,表示“遷移”"
migrate v 遷移,移居(migr+ate)
migratory a 移居的,漂泊的(migr+atory)
migrant n 候鳥,遷移者(migr+ant人或物→遷移的鳥→候鳥)
emigrate v 移居(外國)(e出+migr+ate→移出)
immigrate v 移居;入境(im進+migr+ate→移進)
transmigration n 移居(trans交換+migr+ation→交換移→移居)
migraine n 偏頭痛(migr+ine→移來移去的[頭痛]→偏頭痛)