1. [詞海垂釣]從詞典中“釣”出一串同根詞吧。
re-
2. [舉一反三]根據(jù)已知單詞的詞義推斷出其同根詞的詞義。
sectional a.地方的，地區(qū)的→① sectionalism n.
② sectionalist n.
③ sectionalize v.
3. [同義相連]以下是幾個與insect（昆蟲）有關的派生詞。（提示：-cide=killer;fug=to free;vor=to eat.）
① insectarium a.殺蟲藥劑
② insecticide b.昆蟲學
③ insectifuge c.昆蟲飼養(yǎng)室
④ insectivore d.食蟲的動（植）物
⑤ insectology e.驅(qū)蟲劑
4. [尋根問底]指出下列單詞的詞根并領會其詞義的由來。
① insectile a.似昆蟲的
② insectivorous a.食昆蟲的，以蟲為食的
③ sectile a.（礦物等）可切的；可剖開的
④ resection n. [醫(yī)]切除（術）
⑤ sect n. [宗]教派（尤指分裂出來的異端教派）；宗派
5. [節(jié)外生枝] sect還有3個異形根sec，sex，seg，請記住以下幾組相關的同根詞。
① secant n. [數(shù)]正割，割線
② sex n.性別
sexual a.性別的
sexy a.引起性欲的；色情的
③ segment n.部分；切片
segmental a.部分的；分割的
segmentation n.分割；切斷；細胞分裂
82. sent, sens [L]=to feel感覺
在常用詞sentence，sentiment，sense，nonsense中，有一對同源異形根sent和sens。它們分別來自拉丁動詞sentire和它的動名詞sensum，意思相當于to feel（感覺）。
sentence [sent =to feel 感覺；-ence n. =thing物→“expression of one's feeling or meaning表達感覺或想法的東西”→] n. number of words giving a complete sense or meaning句子（意思完整的一組詞）：a simple sentence簡單句
sentiment [sent=to feel感覺；-i-;-ment n.=the state or result表狀態(tài)或結果→“the state or result of feeling感覺或感覺的結果”→] n. tender of fine feeling;thought arising from feeling情感；思想感情：a man of sentiment感情豐富的人
▽sentimental [sentiment;-al a.] a.多愁善感的；感傷的
presentiment [pre-;sentiment] n.預感
sense [sens=to feel感覺；-e→]Ⅰn. faculty of feeling;inward feeling感官；感覺：the sense of smell嗅覺→Ⅱv. have a feeling without being told感覺，意識到：He sensed danger and stopped moving.他意識到危險，就站住不動。
▽senseless [sense n.;-less a.] a.無知覺的；無感覺的
sensible [sens(e) v.;-ible a.] a.感覺得到的
nonsense [non-=no無；sense n.感覺，意義→“no sense沒有意義”→] n.① speech or writing with no meaning廢話：I want no more of your nonsense.我不許你再瞎說了。②anything meaningless or absure胡鬧：It's all nonsense.這全是胡鬧。
▽nonsensical [nonsens(e);-ical a.] a.無意義的；荒謬的
consent [con-(com-)=together共同；sent=to feel感覺→“to feel together with others與他人共同感覺到”→] v. be of the same feeling;agree同感；同意：The committee consented to the plan. 委員會同意那項計劃。
▽consentient [consent;-ient a.] a.同意的；贊成的
consensus [con-;sens;-us n.] n.（意見的）一致；輿論
dissent [dis-=apart分離；sent=to feel感覺→“to feel apart from others與他人感覺相分離”→] v. think differently;disagree in opinion持異議；不同意：He and I dissent from each other.我與他意見不一致。
▽dissentient [dissent;-i-;-ent a.] a.（對多數(shù)人意見）不同意的
dissension [dis-;sens;-ion n.] n.意見分歧；不和
assent [as-(ad-)=to對；sent=to feel感覺→“to feel agreeable to something對某事感覺良好”→]Ⅰv. express agreement;consent贊同；同意：I assent to your request.我同意你的要求。→Ⅱn. agreeing贊成，同意：The teacher nodded assent to his answer.老師點頭贊同他的答案。
▽assentation [assent;-ation n.] n.贊同；迎合
assentient [assent;-ient a.] a.同意的；贊成的
resent [re-=against對抗；sent=to feel感覺→“to feel against覺得與……相對抗”→] v. feel angry or bitter at對……怨恨：He resents being called a fool.他恨人家叫他傻瓜。
▽resentment [resent;-ment n.] n.怨恨；不滿
resentful [resent;-ful a.] a.忿恨的；不滿的
sensitive [sens=to feel感覺；-itive (-ive) a.=having a special quality有……特點的→“having a special ability of feeling 有特別的感覺能力的”→] a. quick to feel the effect of 敏感的：His ears are highly sensitive to any unusual sound in the machine.他的耳朵對機器的異常聲音十分敏感。
▽sensitivity [sensitiv(e);-ity n.] n.敏感性；靈敏性
sensitize [sens;-itize(-ize) v.] v.使敏感；變敏感
sensuous [sens = to feel 感覺；-u-; -ous a. = belonging to ……的→“belonging to feeling or sense of feeling屬于感覺或感官方面的”→] a.①of senses 感官方面的：sensuous delight 感官上的樂趣 ② giving pleasure of senses給人以美感的：a sensuous painting一幅引起美感的畫
