mindmap root((UMBR)) umber 1、 A darkish brown mineral containing manganese and iron oxides used for coloring paint.
2、 A color that is greenish brown to dark reddish brown.
🌱Van Dyke prized umber as a pigment and used it constantly in his oil paintings. 🌳The mineral deposits of Italy provided sources of a number of natural pigments, among them umber. Since the late Renaissance, umber has been in great demand as a coloring agent. When crushed and mixed with paint, it produces an olive color known as raw umber; when crushed and burnt, it produces a darker tone known as burnt umber. adumbrate 1、 To give a sketchy outline or disclose in part.
2、 To hint at or foretell.
🌱The Secretary of State would only adumbrate his ideas for bringing peace to Bosnia. 🌳A synonym for adumbrate is foreshadow, which means to present a shadowy version of something before it becomes reality or is provided in full. Tough questioning by a Supreme Court justice may adumbrate the way he or she is planning to rule on a case. A bad review by a critic may adumbrate the failure of a new film. And rats scurrying off a ship were believed to adumbrate a coming disaster at sea. penumbra 1、 The partial shadow surrounding a complete shadow, as in an eclipse.
2、 The fringe or surrounding area where something exists less fully.
🌱This area of the investigation was the penumbra where both the FBI and the CIA wanted to pursue their leads. 🌳Every solar eclipse casts an umbra, the darker central area in which almost no light reaches the earth, and a penumbra, the area of partial shadow where part of the sun is still visible. Penumbra can thus be used to describe any "gray area" where things aren't all black and white. For example, the right to privacy falls under the penumbra of the U.S. Constitution; though it isn't specifically guaranteed there, the Supreme Court has held that it is implied, and thus that the government may not intrude into certain areas of a citizen's private life. Because its existence is still shadowy, however, the Court is still determining how much of an individual's life is protected by the right to privacy. umbrage A feeling of resentment at some slight or insult, often one that is imagined rather than real.
🌱She often took umbrage at his treatment of her, without being able to pinpoint what was offensive about it. 🌳An umbrage was originally a shadow, and soon the word also began to mean "a shadowy suspicion." Then it came to mean "displeasure" as well—that is, a kind of shadow blocking the sunlight. Umbrage is now generally used in the phrase "take umbrage at." An overly sensitive person may take umbrage at something as small as having his or her name pronounced wrong.


    UMBR comes from the Latin umbra, meaning "shadow." Thus, the familiar umbrella, with its ending meaning "little," casts a "little shadow" to keep off the sun or the rain.🌸