【根】mut＝to change（改變）

mutate
To undergo or cause to undergo mutation.
vi. 變化，產生突變
vt. 改變，使突變

commute
To travel as a commuter.
To make substitution or exchange. To serve as a substitute.
To pay in gross, usually at a reduced rate, rather than in individual payments.
To substitute (one thing for another); exchange.
To change (a penalty, debt, or payment) to a less severe one.
An act or instance of commuting, especially the trip made by a commuter:
vt. 減刑；交換；用……交換；使……變成
vi. 通勤；代償
n. 通勤（口語）

例句：
His sentence was commuted from death to life imprisonment.
他由死刑改判為終身監禁。
She commutes between Chicago and Rockford every day.
她每天通勤于芝加哥和羅克福德之間。

commutation
A substitution, exchange, or interchange.
The substitution of one kind of payment for another. The payment substituted.
The travel of a commuter.
Electricity. Conversion of alternating to unidirectional current. Reversal of current direction.
Law. Reduction of a penalty to a less severe one.
n. 減刑；交換；經常來往；代償

permutation
A complete change; a transformation.
The act of altering a given set of objects in a group.
Mathematics. A rearrangement of the elements of a set.
n.變更；更換；變換；重排；【數學】排列；置換

permute
To change the order of.
Mathematics. To subject to permutation.
vt. 交換；變更；排列

transmutation
The act or an instance of transmuting; transformation. The state of being transmuted.
Physics. Transformation of one element into another by one or a series of nuclear reactions.
The supposed conversion of base metals into gold or silver in alchemy.
n. 變形；變化；演變

transmute
To change from one form, nature, substance, or state into another; transform: Alchemists tried to transmute lead into gold. See Synonyms at convert.
To undergo transmutation.
vt. 使變形；使變質
vi. 變形；變質

例句：
We can transmute water power into electric power.
我們可以將水力變成電力。
It is impossible to transmute base metals into gold.
把賤金屬變成黃金是不可能的。

趣味單詞

loom
To come into view as a massive, distorted, or indistinct image
To appear to the mind in a magnified and threatening form
To seem imminent; impend
A distorted, threatening appearance of something, as through fog or darkness.
An apparatus for making thread or yarn into cloth by weaving strands together at right angles.
To weave (a tapestry, for example) on a loom.
n. 織布機；若隱若現的景象
vi. 赫然聳現；可怕地出現；朦朧地出現；隱約可見；迫在眉睫
vt. 在織布機上織

例句：
A flagpole loomed up through the mist.
在薄霧中隱隱可見一根旗桿。
“Stalin looms over the whole human tragedy of 1930-1933”(&b{Robert Conquest})
“斯大林赫然聳現在1930—1933年整個人類的悲劇中”(羅伯特·康奎斯特)