后缀：-th [名词后缀]

构成抽象名词，表示行为、性质、状态、情况

warmth 温暖，热情

coolth 凉爽，凉

growth 成长，发育

stealth 秘密行动，秘密

strength 力量（streng=strong）

breadth 力度（bread=broad）

length 长度（leng=long）

width 宽度（wid=wide）

depth 深度（dep=deep）

truth 真理（tru=true）

[注]加在基数词之后，表示“第...”、兼表“...分之一”

fourth 第四，四分之一

fifth 第五，五分之一

sixth 第六，六分之一

seventh 第七，七分之一

词根词缀：delta, delt-

【来源及含义】Greek: triangular; fourth letter; Δ, δ, of the Greek alphabet

【同源单词】delt, delta, Delta Aquarids, delta bar, delta connection, delta flat

词根词缀：quadri-, quadra-, quad-, quadru-

【来源及含义】Latin: four, fourth; a word element for number 4

【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "four, fourth": quatr-; tessara-; tetra-.

【同源单词】biquadrate, carillon, omniquadrante hora, quadragenarian, quadragenary, Quadragesima

词根词缀：quatr-, quart-

【来源及含义】Latin: fourth, four

【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "four, fourth": quadri-; tessara-; tetra-.

【同源单词】biquarterly, quart, quartan, quartation, quarte, quarte

词根词缀：tessara-, tessera-

【来源及含义】Greek > Latin: four; cube; password

【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "four, fourth": quadri-; quatr-; tetra-.

【同源单词】tessara, tessarace, tessaraconter, tessaradecad, tessaradecasyllabon, tessaraglot

词根词缀：tetart-, tetarto-

【来源及含义】Greek: one fourth

【同源单词】tetartanopia, tetartanopic, tetartohedral, tetartohedron

词根词缀：tetra-, tetr-

【来源及含义】Greek: four; a number used as a prefix

【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "four, fourth": quadri-; quatr-; tessara-.

【同源单词】rotundo-tetragonal, tessaraglot, tetrabasic, tetrablastic, tetrabrach, tetrabrachius