firewall

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fire|wall /f'aɪ'ərwɔːl/ (firewalls)
[N-COUNT]
A firewall is a computer system or program that automatically prevents an unauthorized person from gaining access to a computer when it is connected to a network such as the Internet. (COMPUTING)
New technology should provide a secure firewall against hackers.

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abreast

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ablaze

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allowance

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