Englishfor English speakers
arc
Noun
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An arc is part of a circle.
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Electricity jumping from one place to another. This is very bright and looks like lightning.
arc
Verb
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If something arcs, it makes an electrical curve.
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If something arcs, it goes along a curved path.
hollow
Adjective
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If something has nothing inside of it, it is hollow.
The box is hollow.
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If the inside of a tree or log has rotted away so the middle is empty, it is hollow.
The rabbit ran through the hollow log.
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Lacking enthusiasm or cheer
"He let out a hollow laugh"
cathode
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noun
a negatively charged electrode that is the source of electrons entering an electrical device
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noun
the positively charged terminal of a voltaic cell or storage battery that supplies current