词根：-voc-, -vok-

【词根含义】：声音,叫喊

【词根来源】：来源于拉丁语中名词vox, vocis, f(声音,嗓音)及其派生的动词voco, vocare, vocavi, vocatus(叫)。

【同源单词】：advocacy, advocate, advocator, convocation, equivocal

前缀：ad-

【词根含义】：来,临近;朝,向,趋向;加强意义

【词根来源】：来源于拉丁语前缀ad-。

【同源单词】：adapt, adaptable, adaptation, adaptive, addict

词根词缀：-acy, -cy

【来源及含义】Latin: suffix; state, quality, condition, or act of; forming nouns

【同源单词】adequacy, advocacy, albocracy, androcracy, anemocracy, angelocracy

词根词缀：ad-

【来源及含义】Latin: prefix; to, toward, a direction toward, addition to, near, at; and changes to: ac-, af-, ag-, al-, an-, ap-, aq-, ar-, as-, at- when ad- is combined with certain words that begin with the letters c, f, g, l, n, p, q, r, s, and t

【相关描述】The form ad- appears in this form before a vowel and before the consonants d, h, j, m, and v. It is simplified to a- before sc, sp and st.

Before c, f, g, l, n, p, q, r, s, and t; ad- is changed to ac-, af-, ag-, al-, an-, ap-, aq-, ar-, as-, and at-.

In other words, the d of ad usually changes into the same letter as the first letter of the following root or word when it is a consonant: ad-fix becomes affix, and ad-sign becomes assign; therefore, making a double consonant.

Another example includes: attract as with ad-tract (drawn towards); so it has a double t. On the other hand when ad- precedes a vowel, as with adapt, it is simply ad-apt, with one d. For the same reason, there is only one d in adore and adumbrate, because ad- has combined with orare and umbra each of which starts with a vowel.

So, remember: since these Latin words begin with vowels and not consonants, the d of ad does not double as shown in the previous examples.

【同源单词】a capite ad calcem, Ab ovo usque ad mala, Ab uno ad omnes, Abiit ad majores, abjure, accede

词根词缀：-cy

【来源及含义】singular

【相关描述】A suffix that forms nouns.

【同源单词】advocacy, bankruptcy, captaincy, celebacy, democracy, fallacy

词根词缀：voc-, voca-, vocab-, vocat-, -vocation, -vocative, -vocable, vok-, -voke

【来源及含义】Latin: call, talk, speak, say, voice; word

【相关词根词缀】Cross references of word families related directly, or indirectly, to: "talk, speak, speech; words, language; tongue, etc.": cit-; clam-; dic-; fa-; -farious; glosso-; glotto-; lalo-; linguo-; locu-; logo-; loqu-; mythico-; -ology; ora-; -phasia; -phemia; phon-; phras-; Quotes: Language,Part 1; Quotes: Language, Part 2; Quotes: Language, Part 3; serm-; tongue.

【同源单词】Abyssus abyssum invocat, ad hanc vocem, advocacy, advocate, advocate, advocation