前缀：un-

【词根含义】：否定

【词根来源】：在希腊语中为a-, an-,拉丁语中为in-,哥特语为un-,古斯堪的纳维亚语为u-,古高地德语为un-,古英语为ne。

【同源单词】：unable, unalienable, unassuming, unbearable, unceasing

词根词缀：vela-, vel-, veal-

【来源及含义】Latin: covering, velare, "to cover"; a veil

【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "appear, visible, visual, manifest, show, see, reveal, look": blep-; delo-; demonstra-; opt-; -orama; pare-; phanero-; phant-; pheno-; scopo-; spec-; video-, visuo-.

【同源单词】reveal, revealability, revealable, revealableness, revealed, revealer