Englishfor English speakers
safeguard
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verb
make safe
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noun
(= precaution, guard)
a precautionary measure warding off impending danger or damage or injury etc
he put an ice pack on the injury as a precaution
an insurance policy is a good safeguard
we let our guard down
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verb
escort safely
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noun
(= safe-conduct)
a document or escort providing safe passage through a region especially in time of war
reactor
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noun
an electrical device used to introduce reactance into a circuit
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noun
(= nuclear reactor)
(physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements