hacker
noun/ˈhækər/
Frequency rank: #6,270 most common English word
Meaning
a person who uses technical skills to gain unauthorized access to computer systems, or one who creatively solves technical problems.

Example sentence
The company hired hacker to find security vulnerabilities in their system.
Synonyms & related words
- cracker
- intruder
- cybercriminal
- programmer
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