來源於拉丁語，是sui的離格，意爲“apart,whtour”,sed是它的變形。
1.secede
v.withdraw from membership of a state,federation,organization,etc.脫離，退出;se=apart,詞根ced=go
Two factions secede from the party after the controversial vote.
經過具有爭議的投票之後，兩個派別脫離了那個黨。
2.secure
adj,safe 安全的
v.guarantee 保証；使安全；se=apart,cur=care
You might feel more secure in a samller house.
也許在一個較小的房間裡你會感到安全。
3.seduce
v.lead astray;persuade somebody less experienced to have sexual intercourse 引曏歧途；誘奸；se=apart,duc=lead
Foster used expensive gifts to seduce the 16-year-old girl.
弗斯特用貴重的禮物來誘惑這個16嵗的女孩。
4.secrete
v.put or keep in secrete place;produce by secretion 隱秘，隱藏；分泌；se=apart,cret=separtate
Your mouth secretes saliva that starts softening the food before it reaches your stomach.
口腔內分泌的唾液可以使食物在到達胃前就開始軟化。